A list of useful Java frameworks, libraries, software and hello worlds examples
This page lists names, links and short descriptions. The original list on GitHub is the source and belongs to its authors.
The Spring Framework provides a comprehensive programming and configuration model for modern Java-based enterprise applications -- on any kind of deployment platform. A key element of Spring is infrastructural support at the application level: Spring focuses on the "plumbing" of enterprise…
The Guava project contains several of Google's core libraries that we rely on in our Java-based projects: collections, caching, primitives support, concurrency libraries, common annotations, string processing, I/O, and so forth.Requires JDK 1.6 or higher (as of 12.0). License: Apache 2 , .
Apache Commons is an Apache project focused on all aspects of reusable Java components.Commons Proper is dedicated to one principal goal: creating and maintaining reusable Java components. License: Apache 2.
Spring Boot makes it easy to create Spring-powered, production-grade applications and services with absolute minimum fuss. It takes an opinionated view of the Spring platform so that new and existing users can quickly get to the bits they need. License: Apache 2 , .
Very spicy additions to the Java programming language. Project Lombok makes java a spicier language by adding 'handlers' that know how to build and compile simple, boilerplate-free, not-quite-java code. License: MIT , .
Fibers, Channels and Actors for the JVM. Hello World examples. License: Eclipse Public v1.0/GNU Lesser 3, .
The Rootbeer GPU Compiler lets you use GPUs from within Java. License: MIT , .
Jodd is set of open-source Java micro frameworks and tools; floppy size! Jodd = tools + ioc + mvc + db + aop + tx + json + html < 1.5 Mb. License: BSD 2, .
An in-memory file system for Java 7+. License: Apache 2 , .
Spring Batch is a framework for writing offline and batch applications using Spring and Java. License: Apache 2 , .
A convenient Microservices plugin system for Spring & Spring Boot, with over 30 plugins and growing, that supports both micro-monolith and pure microservices styles. License: Apache 2 , .
General purpose utilities and hash functions for Android and Java (aka java-common). License: Apache 2 , .
Lightweight threads for Java, with message passing, nio, http and scheduling support. License: MIT , .
Apache Isis is a framework for rapidly developing domain-driven apps in Java. Write your business logic in entities, domain services and repositories, and the framework dynamically (at runtime) generates a representation of that domain model as a webapp or as a RESTful API. For prototyping or…
Apache Zest is a community based effort exploring Composite Oriented Programming for domain centric application development. This includes evolved concepts from Aspect Oriented Programming, Dependency Injection and Domain Driven Design. License: Apache 2.
Framework to easily create LLM powered bots over any dataset.
The Play Framework combines productivity and performance making it easy to build scalable web applications with Java and Scala. https://www.playframework.com/ . License: Apache 2 , .
Spark - a Sinatra inspired web framework. License: Apache 2 , .
a simple, elegant java web framework! License: Apache 2 , .
Realtime Client Server Framework for the JVM, supporting WebSockets with Cross-Browser Fallbacks. License: CDDL1 / Apache 2 , .
Grails is a framework used to build web applications with the Groovy programming language. The core framework is very extensible and there are numerous plugins available that provide easy integration of add-on features. https://grails.org/ License: Apache 2 , .
Ninja is a full stack web framework for Java. Rock solid, fast and super productive. .http://www.ninjaframework.org. License: Apache 2 , .
Orbit - Virtual actor framework for building distributed systems. License: BSD 3, .
Ratpack is a simple, capable, toolkit for creating high performance web applications. Ratpack is built on Java and the Netty event-driven networking engine. The API is optimized for Groovy and Java 8.. https://ratpack.io/ License: Apache 2 , .
Vaadin is a Java framework for building modern web applications that look great, perform well and make you and your users happy.https://vaadin.com/ License: Apache 2 , .
ZK is a highly productive Java framework for building amazing enterprise web and mobile applications. License: GNU Lesser, .
A component-oriented framework for creating highly scalable web applications in Java. License: Apache 2.
Open Source Java web framework that powers thousands of web applications and web sites for governments, stores, universities, cities, banks, email providers, and more. License: Apache 2.
GWT is used by many products at Google, including Google AdWords and Google Wallet. It's open source, completely free, and used by thousands of enthusiastic developers around the world. License: Apache 2.
It's an open source micro web framework in Java, with minimal dependencies and a quick learning curve.The goal of this project is to create a micro web framework in Java that should be easy to use and hack. Pippo can be used in small and medium applications and also in applications based on micro…
Spring MVC web application and RESTful web service framework. License: Apache 2.
JavaServer™ Faces technology simplifies building user interfaces for JavaServer applications. License: GNU 2 or CDDL 1.0
This project provides a container independent implementation of JSP 2.1. License: GNU 2 or CDDL 1.0
Web development framework: separation of concerns, component-based. License: Apache 2.
Apache Struts is a free open-source framework for creating Java web applications. License: Apache 2.
Innovative Web framework based on JCR and OSGi. License: Apache 2.
The first free open source JavaServer(tm) Faces implementation. License: Apache 2.
Apache Pivot is an open-source platform for building installable Internet applications (IIAs) [rich Internet application]. License: Apache 2.
Turbine is a servlet based framework that allows Java developers to quickly build web applications. License: Apache 2.
Apache OODT software is component based, and offers a software architecture beyond simple science applications. License: Apache 2.
VRaptor 4 delivers high productivity to your Java Web applications on top of CDI. VRaptor is an opensource MVC framework with a large developers and users community, . http://www.vraptor.org . License: Apache 2.
Scalable, fast and modular micro web framework for Java , . http://jooby.org/ . License: Apache 2.
High-level framework for developing enterprise applications with a rich web interface, based on Spring, EclipseLink and Vaadin. https://cuba-platform.com . License: Apache 2.
Jersey RESTful Web Services framework is open source, production quality, framework for developing RESTful Web Services in Java that provides support for JAX-RS APIs and serves as a JAX-RS (JSR 311 & JSR 339) Reference Implementation.
A multi-language port of Browserscope's user agent parser. License: Apache 2/MIT/Perl, .
Ghost Driver is an implementation of the Remote WebDriver Wire protocol, using PhantomJS as back-end. License: BSD 2, .
A blogging system written in Java, feel free to create your or your team own blog. License: Apache 2 , .
A Spring Project with spring security support with angular admin panel. License: Apache 2 , .
BaasBox is an Open Source project that aims to provide a backend for mobile and web apps. License: ?, .
The project is a Maven archetype for Spring MVC 4 web application. License: ?, .
Record web requests as they happen and turn them into reusable code in any programming language. Gargl - Generic API Recorder and Generator Lite. Pronounced "Gargle." Automate any website. Record web requests as they happen and turn them into reusable code in any programming language. License: MIT…
The liferay-plugins repository is part of the Liferay Portal project. Liferay Portal is an open source enterprise web platform for building business solutions that deliver immediate results and long-term value. License: GNU Lesser 2.1, .
Ribbon is a Inter Process Communication (remote procedure calls) library with built in software load balancers. The primary usage model involves REST calls with various serialization scheme support. License: Apache 2 , .
A GWT Library that provides the widgets of Bootstrap, from Twitter. License: Apache 2 , .
Zuul is an edge service that provides dynamic routing, monitoring, resiliency, security, and more. License: Apache 2 , .
PrimeUI is a pure CSS-JS library designed to work with any server side and client side technology featuring 50+ jQuery Widgets, Web Components, Premium Layouts-Themes and more. PrimeUI is an offspring project of the mighty PrimeFaces. License: Apache 2.
Spring Boot makes it easy to create Spring-powered, production-grade applications and services with absolute minimum fuss. It takes an opinionated view of the Spring platform so that new and existing users can quickly get to the bits they need. License: Apache 2.
A tool for embedding data URIs in CSS files. License: MIT , .
Google Reader inspired self-hosted RSS reader. License: Apache 2 , .
Anything To Triples (Any23) is a library, a web service and a command line tool that extracts structured data in RDF format from a variety of Web. License: Apache 2.
Apache Forrest software is a publishing framework that transforms input from various sources into a unified presentation in one or more output formats. License: Apache 2.
Velocity is a project of the Apache Software Foundation, charged with the creation and maintenance of open-source software related to the Apache Velocity Engine (templating engine). License: Apache 2.
Apache FreeMarker is a template engine: a Java library to generate text output (HTML web pages, e-mails, configuration files, source code, etc.) based on templates and changing data. License: Apache 2.
Logic-less and semantic templates with Java, . License: Apache 2.
It is a template engine capable of processing and generating HTML, XML, JavaScript, CSS and text, and can work both in web and non-web environments. It is better suited for serving the view layer of web applications, but it can process files in many formats, even in offline environments. License:…
Implementation of mustache.js (web application templating system) for Java. License: Apache 2 , .
Apache Tiles is a templating framework built to simplify the development of web application user interfaces. License: Apache 2.
Software components for semantic content management. License: Apache 2.
A feature-rich and extensible WikiWiki engine built around the standard J2EE components (Java, servlets, JSP). icense: Apache 2.
The Apache Portals project provides various software products, including Apache Jetspeed-2, Apache Pluto, and Apache Portals Applications. License: Apache 2.
Apache Roller is a full-featured, multi-user and group blog server suitable for blog sites large and small. License: Apache 2.
Apache Chemistry provides open source implementations of the Content Management Interoperability Services (CMIS) specification. License: Apache 2.
Jease eases the development of content- & database-driven web-applications with Java. License: GPL v3.
JavaFX is the next step in the evolution of Java as a rich client platform. It is designed to provide a lightweight, hardware-accelerated Java UI platform for enterprise business applications. License: Oracle, proprietary.
JavaFX Scene Builder is a visual layout tool that lets users quickly design JavaFX application user interfaces, without coding. Users can drag and drop UI components to a work area, modify their properties, apply style sheets, and the FXML code for the layout that they are creating is…
Scene Builder is free and open source JavaFX Scene Builder, but is backed by Gluon. Commercial support offerings are available, including training and custom consultancy services. License: BSD.
SWT is an open source widget toolkit for Java designed to provide efficient, portable access to the user-interface facilities of the operating systems on which it is implemented. License: Eclipse Public License v1.0.
Lanterna is a Java library allowing you to write easy semi-graphical user interfaces in a text-only environment, very similar to the C library curses but with more functionality. License: LGPL 2.1.
Gephi is an award-winning open-source platform for visualizing and manipulating large graphs. It runs on Windows, Mac OS X and Linux. Localization is available in French, Spanish, Japanese, Russian, Brazilian Portuguese, Chinese and Czech. License: GNU 3 or CDDL 1.0.
Open-source cross-platform app development solution for writing native apps for desktop, web & mobile in Java/Kotlin. (GPL + Classpath Exception)
An open source event analytics platform. License: MIT , .
Open-Source Subscription Billing & Payment Platform . License: Apache 2 , .
Activiti is a light-weight workflow and Business Process Management (BPM) Platform targeted at business people, developers and system admins. Its core is a super-fast and rock-solid BPMN 2 process engine for Java. License: Apache 2 , .
Liferay Portal is an open source enterprise web platform for building business solutions that deliver immediate results and long-term value. Liferay Portal started out as a personal development project in 2000 and was open sourced in 2001. License: GNU Lesser 2.1, .
Broadleaf Commerce - Enterprise eCommerce framework based on Spring. License: Broadleaf Fair Use , .
Drools Expert is the rule engine and Drools Fusion does complex event processing (CEP). License: Apache 2 , .
Spring Roo is a next-generation rapid application development tool for Java developers. It focuses on higher productivity, stock-standard Java APIs, high usability, avoiding engineering trade-offs and facilitating easy Roo removal. License: Apache 2 , .
Apache OFBiz (The Apache Open For Business Project) is an open source enterprise automation software project. License: Apache 2.
The Apache Portals project provides various software products, including Apache Jetspeed-2, Apache Pluto, and Apache Portals Applications. License: Apache 2.
Apache ODE is a WS-BPEL implementation that supports web services orchestration using flexible process definitions. License: Apache 2.
Desktop/Android/HTML5/iOS Java game development framework. License: Apache 2 , .
An experimental toolset for Unity asset and asset bundle files. License: unlicense.org, .
LibGDX/LWJGL tutorials and examples. License: ?, .
A complete 3D game development suite written purely in Java.. https://jmonkeyengine.org/ License: BSD 3, .
Jetserver is a high speed nio socket based multiplayer java game server written using Netty and Mike Rettig's Jetlang.It is specifically tuned for network based multiplayer games and supports TCP and UDP network protocols. License: MIT , .
LWJGL 2.X - The Lightweight Java Game Library. https://www.lwjgl.org/ License: BSD 3, .
JogAmp’s Ardor3D Continuation is a general-purpose, professionally oriented, open source, scenegraph based 3D Java engine for desktop and embedded environments, using JOGL for its hardware graphics acceleration. Fork of jMonkeyEngine 2.0. Cross-platform. License: zlib.
Produces browser games with pseudo-3D views. Games can be turned into Facebook Apps. Intended for beginners. 2.5D. Cross-platform. Notable games: Underworld Online. License: GPL
A Java game development framework that deploys to Windows, Linux, HTML5, Android and iOS. Notable games: Angry Birds Chrome. Cross-platform. License: Apache 2.0. .
3D game engine that creates an interface for dynamically adding EnvObjects. Built on jMonkeyEngine 2.0. Cross-platform License: GPL
Java port of the Quake II game engine. 2D. Cross-platform License: GPL
JOGRE (Java Online Gaming Real-time Engine) which is an open-source, online, real-time gaming engine and API programmed entirely in Java. License: GPL
Targeted for web based games. License: Proprietary
JavaFX Game Development Framework. License: MIT, .
The Guava project contains several of Google's core libraries that we rely on in our Java-based projects: collections, caching, primitives support, concurrency libraries, common annotations, string processing, I/O, and so forth.Requires JDK 1.6 or higher (as of 12.0). License: Apache 2 , .
Commons-Collections seek to build upon the JDK classes by providing new interfaces, implementations and utilities. Hello World examples. License: Apache 2.
A supplement or replacement for the Java Collections Framework. Hello World examples. License: Apache 2 , .
Eclipse Collections is a collections framework for Java. It has JDK-compatible List, Set and Map implementations with a rich API, additional types not found in the JDK like Bags, Multimaps and set of utility classes that work with any JDK compatible Collections, Arrays, Maps or Strings. The…
javatuples is one of the simplest java libraries ever made. Its aim is to provide a set of java classes that allow you to work with tuples.A tuple is just a sequence of objects that do not necessarily relate to each other in any way. For example: [23, "Saturn", java.sql.Connection@li734s] can be…
Java annotation processors to generate simple, safe and consistent value objects. Do not repeat yourself, try Immutables, the most comprehensive tool in this field. License: Apache 2.
Micro second messaging that stores everything to disk. License: GNU Lesser 3.0, .
fastutil extends the Java™ Collections Framework by providing type-specific maps, sets, lists and queues with a small memory footprint and fast access and insertion; provides also big (64-bit) arrays, sets and lists, and fast, practical I/O classes for binary and text files. It requires Java 7 or…
HPPC provides template-generated implementations of typical collections, such as lists, sets and maps, for all Java primitive types. The primary driving force behind HPPC is optimization for highest performance and memory efficiency. License: Apache 2.
Java Collections till the last breadcrumb of memory and performance . This library is a carefully designed and efficient extension of the Java Collections Framework with primitive specializations and more. Java 6+. License: Apache 2.
The Trove library provides high speed regular and primitive collections for Java. License: GNU Lesser 2.1.
Underscore-java is a java port of Underscore.js. In addition to porting Underscore's functionality, Underscore-java includes matching unit tests. License: MIT , .
An easy-to-use Java-based calendar converter - able to convert between various known calendars. License: Apache 2.
Joda-Time provides a quality replacement for the Java date and time classes. License: Apache 2, .
Backport of functionality based on JSR-310 to Java SE 6 and 7. This is NOT an implementation of JSR-310. License: BSD 3.
Advanced date, time and interval library for Java. License: GNU Lesser 2.1.
Social Style Date and Time Formatting for Java.PrettyTime is an OpenSource time formatting library. Completely customizable, it creates human readable, relative timestamps like those seen on Digg, Twitter, and Facebook. Get started “right now!” and in over 30 languages! License: Apache 2 , .
Provides additional date-time classes that complement those in JDK 8. business-friendly BSD 3-clause license
The Spring Framework provides a comprehensive programming and configuration model for modern Java-based enterprise applications -- on any kind of deployment platform. A key element of Spring is infrastructural support at the application level: Spring focuses on the "plumbing" of enterprise…
A fast dependency injector for Android and Java. Hello World examples. License: Apache 2 , , stackoverflow - 800 questions.
Guice (pronounced 'juice') is a lightweight dependency injection framework for Java 6 and above, brought to you by Google. Hello World examples. License: Apache 2, .
DeltaSpike consists of a number of portable CDI extensions that provide useful features for Java application developers. We will also ensure true portability! We are testing DeltaSpike on different CDI implementations like Apache OpenWebBeans and JBoss Weld, and also on different Java EE servers…
A light-weight and dynamic dependency injection framework. GNU 2/ CDDL 1.0.
AspectJ is a seamless aspect-oriented extension to the Java programming language, Java platform compatible, easy to learn and use. License: Eclipse Public 1.0.
Command line parsing framework for Java. http://jcommander.org/ License: Apache 2 , .
JLine is a Java library for handling console input. It is similar in functionality to BSD editline and GNU readline. People familiar with the readline/editline capabilities for modern shells (such as bash and tcsh) will find most of the command editing features of JLine to be familiar. License:…
args4j is a small Java class library that makes it easy to parse command line options/arguments in your CUI application. License: MIT
The shell for the Java Platform Open source and open minde. License: GNU Lesser 2.1
Annotation based command line parser with strong typing for both options and positional args and support for git-like subcommands. Usage help with ANSI colors. Easily included as source to avoid external dependencies. License: Apache 2
Backport of Java 8's lambda expressions to Java 7, 6 and 5. License: Apache 2 , .
Vavr (formerly called Javaslang) is a functional library for Java 8+. It helps to reduce the amount of code and to increase the robustness. A first step towards functional programming is to start thinking in immutable values. Vavr provides immutable collections and the necessary functions and…
jOOλ - The Missing Parts in Java 8 jOOλ improves the JDK libraries in areas where the Expert Group's focus was elsewhere. It adds tuple support, function support, and a lot of additional functionality around sequential Streams, . License: Apache 2.
Functional Java is an open source library facilitating functional programming in Java. The library implements numerous basic and advanced programming abstractions that assist composition oriented development. Functional Java also serves as a platform for learning functional programming concepts by…
A comprehensive functional reactive platform for JDK8. Future & functional based programming via JDK compatible extensions for Java 8 and above, . License: MIT
Java 8 has standardised some of the basic function interfaces, but does not include quite a few more tools that a functional programmer may expect to be available. This library attempts to fill in some of the gaps when using Java 8. In particular it provides Option and Either types as well as a…
Another functional library for Java , License: Apache 2, .
Java 8 annotation processor and framework for deriving algebraic data types constructors, pattern-matching, morphisms, (near future: optics and typeclasses), . License: GNU 3.
RxJava – Reactive Extensions for the JVM – a library for composing asynchronous and event-based programs using observable sequences for the Java VM. License: Apache 2 , , stackoverflow - 1814 questions.
Vert.x is a tool-kit for building reactive applications on the JVM . License: Eclipse Public 1 / Apache 2 , , stackoverflow - 728 questions.
The purpose of Reactive Streams is to provide a standard for asynchronous stream processing with non-blocking backpressure. License: Public Domain (CC0), .
Reactor is a second-generation Reactive library for building non-blocking applications on the JVM based on the Reactive Streams Specification. License: Apache 2.
RSocket is a binary protocol for use on byte stream transports such as TCP, WebSockets, and Aeron. License: Apache 2,
A small one-time password generator library according to RFC 4226 (HOTP) and RFC 6238 (TOTP). MIT
Simple OAuth library for Java. License: MIT , .
Support for adding OAuth1(a) and OAuth2 features (consumer and provider) for Spring web applications. License: Apache 2 , .
Apereo CAS - Single Sign On for the Web.The Central Authentication Service (CAS) is the standard mechanism by which web applications should authenticate users. License: Apache 2 , .
Spring Security provides security services for the Spring IO Platform. Spring Security 3.1 requires Spring 3.0.3 as a minimum and also requires Java 5. License: Apache 2 , .
An authentication plugin for Play Framework 2.x (Java). License: Apache 2 , .
Apache Shiro is a powerful and easy-to-use Java security framework that performs authentication, authorization, cryptography, and session management. With Shiro’s easy-to-understand API, you can quickly and easily secure any application – from the smallest mobile applications to the largest web…
Legion of the Bouncy Castle Java cryptography APIs.A lightweight cryptography API. License: MIT.
Free client-side encryption for your cloud files. Open source software: No backdoors, no registration. License: MIT.
Easy-to-use crypto toolkit. License: Apache 2.
Integrated SSO and IDM for browser apps and RESTful web services. Built on top of the OAuth 2.0, Open ID Connect, JSON Web Token (JWT) and SAML 2.0 specifications. Keycloak has tight integration with a variety of platforms and has a HTTP security proxy service where we don't have tight…
Simplified Security and Identity management for Java Applications PicketLink is an umbrella project for security and identity management for Java Applications. It is licensed under a friendly Apache v2 license. License: Apache 2.
Library implementing XML Digital Signature Specification & XML Encryption Specification. License: Apache 2.
( has retired ) Apache Oltu is an OAuth protocol implementation in Java. License: Apache 2.
Apache Syncope is an Open Source system for managing digital identities in enterprise environments. License: Apache 2.
JObfuscator is a source code obfuscator for the Java language to protect Java source code & algorithms from hacking, cracking, reverse engineering, decompilation & technology theft. License:
High Performance data structures and utility methods for Java and C++, License: Apache 2.
Inter-thread messaging library. License: Apache 2.
ibrary for real-time and embedded systems. License: BSD 2.
Concurrency tools currently missing from the JDK. License: Apache 2.
Delivers struct types for Java programming language. 64 bit addressable struct arrays. https://tehleo.github.io/junion/ License: [License: BSD 3.
A modern I/O API for Java. License: Apache 2 , .
A lightning fast, transactional, file-based FIFO for Android and Java. License: Apache 2 , .
Simple Binary Encoding (SBE) - High Performance Message Codec. License: Apache 2 , .
MessagePack serializer implementation for Java. License: Apache 2 , .
Memory efficient serialization library that can access serialized data without unpacking and parsing it. License: Apache 2.
JDK compatible high performance object graph serialization. License: Apache 2.
Free and open source log management. License: GNU 3, .
The reliable, generic, fast and flexible logging framework for Java.. http://logback.qos.ch/. License: Eclipse Public 1.0/GNU Lesser 2.1, .
Abstraction layer which is to be used with an implementation. http://www.slf4j.org/ License: MIT , .
Apache Log4j 2 is an upgrade to Log4j that provides significant improvements over its predecessor. License: Apache 2.
Open-source aggregator suited for extended role and permission management. License: GNU 3.
Analyzes and visualizes log files. Some features require payment. License: Apache 2.
Tool for managing log files. License: Apache 2.
Expose metrics via JMX or HTTP and can send them to a database. License: Apache 2.
Lightweight logging framework with static logger class. License: Apache 2.
Dozer is a Java Bean to Java Bean mapper that recursively copies data from one object to another. Hello World examples. License: Apache 2, .
An annotation processor for generating type-safe bean mappers. Hello World examples. License: Apache 2, .
Simple, Intelligent, Object Mapping. Hello World examples. License: Apache 2, .
Simpler, better and faster Java bean mapping framework. Hello World examples. License: Apache 2, .
Stupid Simple Statically Linked Mapper. Hello World examples. Selma Java bean mapping that compiles. License: Apache 2, .
Apache BVal delivers an implementation of the Java Bean Validation (JSR303) Specification which is TCK compliant, works on Java SE 5 or later. License: Apache 2.
is a pragmatic and extensible validation framework for any kind of Java objects. Not JSR303/JSR380 compliant but supports Bean Validation constraints. It's pretty old flexible and reliable. License: EPL v2.0.
A Java library that models spring dynamics and adds real world physics to your app. License: BSD, .
Source code for the Processing Development Environment (PDE) . License: GNU 2, .
JavaCV uses wrappers from the JavaCPP Presets of commonly used libraries by researchers in the field of computer vision (OpenCV, FFmpeg, libdc1394, PGR FlyCapture, OpenKinect, videoInput, ARToolKitPlus, and flandmark), and provides utility classes to make their functionality easier to use on the…
Simple Java image-scaling library implementing Chris Campbell's incremental scaling algorithm as well as Java2D's "best-practices" image-scaling techniques. License: Apache 2 , .
Project goal is to give users possibility to access build-in or connected via USB webcams or remote IP / network cameras directly from Java code. Using provided libraries user is able to read camera images and detect motion. License: MIT , .
Thumbnailator's fluent interface can be used to perform fairly complicated thumbnail processing task in one simple step.
A collection of source code generators for Java. License: Apache 2 , .
JavaPoet is a Java API for generating .java source files. License: Apache 2 , .
Runtime code generation for the Java virtual machine. http://bytebuddy.net/ License: Apache 2 , .
ASM is an all purpose Java bytecode manipulation and analysis framework. It can be used to modify existing classes or dynamically generate classes, directly in binary form. Provided common transformations and analysis algorithms allow to easily assemble custom complex transformations and code…
Byteman is a tool which makes it easy to trace, monitor and test the behaviour of Java application and JDK runtime code. It injects Java code into your application methods or into Java runtime methods without the need for you to recompile, repackage or even redeploy your application. License: LGPL…
Javassist (Java Programming Assistant) makes Java bytecode manipulation simple. It is a class library for editing bytecodes in Java; it enables Java programs to define a new class at runtime and to modify a class file when the JVM loads it. License: Apache 2 or LGPL or later 2.1 or Mozilla Public…
This library implements Algebraic Data Types for Java. ADT4J provides annotation processor for @GenerateValueClassForVisitor annotation. ADT4J generates new class for each @GenerateValueClassForVisitor annotation. License: BSD 3.
Hipster stack for Java developers. Spring Boot + AngularJS in one handy generator. License: Apache 2.
cglib - Byte Code Generation Library is high level API to generate and transform Java byte code. It is used by AOP, testing, data access frameworks to generate dynamic proxy objects and intercept field access. License: Apache 2.
Akka is a toolkit and runtime for building highly concurrent, distributed, and resilient message-driven applications on the JVM. License: Apache 2.
Apache Storm is a free and open source distributed realtime computation system. Storm makes it easy to reliably process unbounded streams of data, doing for realtime processing what Hadoop did for batch processing. Storm is simple, can be used with any programming language, and is a lot of fun to…
Heron is realtime analytics platform developed by Twitter. It is the direct successor of Apache Storm, built to be backwards compatible with Storm's topology API but with a wide array of architectural improvements. . http://heronstreaming.io License: Apache 2.
ZooKeeper is a centralized service for maintaining configuration information, naming, providing distributed synchronization, and providing group services. All of these kinds of services are used in some form or another by distributed applications. License: Apache 2.
Dubbo is a distributed service framework empowers applications with service import/export capability with high performance RPC. License: Apache 2 , .
ZooKeeper client wrapper and rich ZooKeeper framework. License: Apache 2 , .
The axon framework is focussed on making life easier for developers that want to create a java application based on the CQRS principles. The framework is used in a lot of environments. License: Apache 2.
The Leading Open Source In-Memory Data Grid: Distributed Computing, Simplified. License: Apache 2.
Hystrix is a latency and fault tolerance library designed to isolate points of access to remote systems, services and 3rd party libraries, stop cascading failure and enable resilience in complex distributed systems where failure is inevitable, . License: Apache 2.
JGroups is a toolkit for reliable messaging. It can be used to create clusters whose nodes can send messages to each other. License: Apache 2.
Orbit is a modern framework for JVM languages that makes it easier to build and maintain distributed and scalable online services. It was developed by BioWare, a division of Electronic Arts. License: BSD 3.
Quasar is an open source JVM library that greatly simplifies the creation of highly concurrent software that is very easy to write and reason about, performant, and fault tolerant. License: Eclipse Public License v1.0 or LGPL 3.0.
A collection of spouts, bolts, serializers, DSLs, and other goodies to use with Storm. License: Eclipse Public 1.0, .
JADE (Java Agent DEvelopment Framework) is a software Framework fully implemented in the Java language. It simplifies the implementation of multi-agent systems through a middle-ware that complies with the FIPA specifications and through a set of graphical tools that support the debugging and…
Apache River software provides a standards-compilani JINI service. License: Apache 2.
Apache Tuscany simplifies the task of developing SOA solutions by providing a comprehensive infrastructure for SOA development and management that is based on Service Component Architecture (SCA) standard. License: Apache 2.
Reactive Microservices for the JVM. https://www.lightbend.com/lagom . License: Apache 2, .
DataMelt is a free mathematics software for scientists, engineers and students. It can be used for numeric computation, statistics, symbolic calculations, data analysis and data visualization. License: GNU 3.
JGraphT is a free Java class library that provides mathematical graph-theory objects and algorithms. It runs on Java 2 Platform (requires JDK 1.7 or later). License: Eclipse Public License or LGPL 2.1.
Provides a set of classes to work with scientific measurements and units. License: BSD 2.
General classes of a Java scientific and numerical library written by Michael Thomas Flanagan to support both his own research and his undergraduate programming courses and projects. License: only for non-commercial use.
Apache ACE is a software distribution framework that allows you to centrally manage and distribute software components, configuration data and other artifacts to target systems. It is built using OSGi and can be deployed in different topologies. The target systems are usually also OSGi based, but…
The Aries project consists of a set of pluggable Java components enabling an enterprise OSGi application programming model. License: Apache 2.
OSGi framework implementation and related technologies. License: Apache 2.
Apache Karaf is an OSGi distribution for server-side applications. License: Apache 2.
OSGI framework implementation and related technologies. License: EPL
OSGI based server that is designed to run enterprise Java applications and Spring-powered applications. License: EPL
Titan is a highly scalable graph database optimized for storing and querying large graphs with billions of vertices and edges distributed across a multi-machine cluster. Titan is a transactional database that can support thousands of concurrent users, complex traversals, and analytic graph…
Cassandra is a partitioned row store. Rows are organized into tables with a required primary key. License: Apache 2 , .
OrientDB is the first Multi-Model DBMS with Document & Graph engine. OrientDB can run distributed (Multi-Master), supports SQL, ACID Transactions, Full-Text indexing, Reactive Queries and has a small memory footprint. OrientDB is licensed with Apache 2 license and the development is driven by…
Neo4j is the world’s leading Graph Database. It is a high performance graph store with all the features expected of a mature and robust database, like a friendly query language and ACID transactions. License: GNU 3/ GNU AGPLv3, .
MapDB provides concurrent Maps, Sets and Queues backed by disk storage or off-heap-memory. It is a fast and easy to use embedded Java database engine. http://www.mapdb.org/. License: Apache 2 , .
An open source clone of Amazon's Dynamo. Voldemort is a distributed key-value storage system. License: Apache 2 , .
Memory-Speed Virtual Distributed Storage System. License: Apache 2 , .
A scalable, distributed Time Series Database. License: GNU 3, .
Open Source In-Memory Data Grid. License: Apache 2 , .
A Property Graph Model Interface. It provides implementations, test suites, and supporting extensions. Graph databases and frameworks that implement the Blueprints interfaces automatically support Blueprints-enabled applications. Likewise, Blueprints-enabled applications can plug-and-play…
Apache Lucene/Solr. Lucene is a search engine library Solr is a search engine server that uses lucene. License: Apache 2 , .
Java Indexed Record Chronicle — This library is an ultra low latency, high throughput, persisted, messaging and event driven in memory database. License: Apache 2 , .
ToroDB - Open source NoSQL database that runs on top of a RDBMS. Compatible with MongoDB protocol and APIs, but with support for native SQL, atomic operations and reliable and durable backends like PostgreSQL. License: GNU AGPLv3, .
Crate.IO: The fast, scalable, easy to use SQL database with native full text search. https://crate.io/ .License: Apache 2 , .
A realtime distributed OLAP datastore. Pinot is a realtime distributed OLAP datastore, which is used at LinkedIn to deliver scalable real time analytics with low latency. License: Apache 2 , .
Solandra is a real-time distributed search engine built on Apache Solr and Apache Cassandra. License: Apache 2 , .
VoltDB is a horizontally-scalable, in-memory SQL RDBMS designed for applications that have extremely high read and write throughput requirements. License: GNU AGPLv3, .
This is a rewrite (port) of LevelDB in Java. This goal is to have a feature complete implementation that is within 10% of the performance of the C++ original and produces byte-for-byte exact copies of the C++ code.. License: Apache 2 , .
KairosDB is a fast distributed scalable time series database written on top of Cassandra. License: Apache 2 , .
Sensei is a distributed, elastic realtime searchable database. License: Apache 2 , .
Distributed database specialized in exporting key/value data from Hadoop. License: BSD 3, .
Apache Drill is a distributed MPP query layer that supports SQL and alternative query languages against NoSQL and Hadoop data storage systems. License: Apache 2 , .
Rexster is a graph server that exposes any Blueprints graph through HTTP/REST and a binary protocol called RexPro. Extensions support standard traversal goals such as search, score, rank, and, in concert, recommendation. License: BSD 3, .
Redis-backed non-sticky session store for Apache Tomcat. License: MIT , .
Embulk is a parallel bulk data loader that helps data transfer between various storages, databases, NoSQL and cloud services. License: Apache 2 , .
Welcome to H2, the Java SQL database. The main features of H2 are: Very fast, open source, JDBC API, Embedded and server modes; in-memory databases, Browser based Console application,Small footprint: around 1.5 MB jar file size License: Mozilla Public License 1.1. and Eclipse Public License v1.0.
Apache Derby, an Apache DB subproject, is an open source relational database implemented entirely in Java. Derby provides an embedded JDBC driver that lets you embed Derby in any Java-based solution. License: Apache 2.
Apache Empire-db is a lightweight relational database abstraction layer and data persistence component. License: Apache 2.
Apache Ignite is an In-Memory Data Fabric providing in-memory data caching, partitioning, processing, and querying components. License: Apache 2.
is an open-source NoSQL database management system and Lua application server. It maintains databases in memory and ensures crash resistance with write-ahead logging. It includes a Lua interpreter and interactive console but also accepts connections from programs in several other languages.…
Apache HBase is an open-source, distributed, versioned, non-relational database modeled after Google's Bigtable: A Distributed Storage System for Structured Data by Chang et al. License: Apache 2.
Druid is a fast column-oriented distributed data store. http://druid.io License: Apache 2, .
Infinispan is a distributed in-memory key/value data store with optional schema. It can be used both as an embedded Java library and as a language-independent service accessed remotely over a variety of protocols (HotRod, REST, Memcached and WebSockets). License: Apache 2.
Apache Avro is a data serialization system. License: Apache 2.
The smallest, fastest columnar storage for Hadoop workloads. License: Apache 2.
Apache Parquet is a columnar storage format available to any project in the Hadoop ecosystem, regardless of the choice of data processing framework, data model or programming language. License: Apache 2.
The Apache Thrift software framework, for scalable cross-language services development, combines a software stack with a code generation engine to build services that work efficiently and seamlessly between C++, Java, Python, PHP, Ruby, Erlang, Perl, Haskell, C#, Cocoa, JavaScript, Node.js,…
PCollections serves as a persistent and immutable analogue of the Java Collections Framework. License: MIT.
Protocol Buffers (a.k.a., protobuf) are Google's language-neutral, platform-neutral, extensible mechanism for serializing structured data. License: BSD 3.
Simple Binary Encoding (SBE) - High Performance Message Codec. License: Apache 2 , .
Clean, lightweight protocol buffers for Android and Java. License: Apache 2.
Elasticsearch is a distributed RESTful search engine built for the cloud. License: Apache 2 , .
This project contains IndexTank (http://www.searchify.com) search engine implementation. Includes features like variables (boosts), categories (facets), faceted search, snippeting, custom scoring functions, suggest, and autocomplete. License: Apache 2 , .
Apache Lucene/Solr. Lucene is a search engine library Solr is a search engine server that uses lucene. License: Apache 2 , .
A flexible, partial, out-of-order and real-time typeahead search library. License: Apache 2 , .
AWS (Amazon Web Service) Cloud Plugin for Elasticsearch. License: Apache 2 , .
The IK Analysis plugin integrates Lucene IK analyzer into elasticsearch, support customized dictionary. License: ?, .
Open-source software for transferring content between repositories or search indexes License: Apache 2.
The Lemur Project develops search engines, browser toolbars, text analysis tools, and data resources that support research and development of information retrieval and text mining software, including the Indri search engine and ClueWeb09 dataset. License: BSD License
The YaCy Search Engine application, http://yacy.net/ . License: GNU Lesser and GNU
Distributed SQL query engine for big data (Cassandra, Hive, Kafka, MySQL, PostgreSQL and so on). License: Apache 2 , .
A blazingly small and sane redis java client. License: MIT , .
A Graph Traversal Language. Gremlin is a domain specific language for traversing property graphs. Gremlin makes use of Pipes to perform complex graph traversals. This language has application in the areas of graph query, analysis, and manipulation. License: BSD 3 , .
The Java driver for MongoDB. License: Apache 2 / Creative Commons Attribution , .
MySQL Performance Analyzer is an open source project for MySQL performance monitoring and analysis. License: Apache 2 , .
Web UI for PrestoDB. License: Apache 2 , .
MongoDB Connector for Hadoop. License: ?, .
JDBC importer for Elasticsearch. License: Apache 2 , .
Flyway by Boxfuse. Database Migrations Made Easy. https://flywaydb.org/ . License: Apache 2 , .
MongoDB River Plugin for ElasticSearch. License: Apache 2 , .
Cassandra Java Client. License: Apache 2 , .
Liquibase — source control for your database, supports multiple developers, database types and so on. http://www.liquibase.org/ . License: Apache 2 , .
MongoDB object-document mapper in Java based on. License: Apache 2 , .
Enables full-text searching of CouchDB documents using Lucene. License: Apache 2 , .
Phoenix is a SQL skin over HBase, delivered as a client-embedded JDBC driver, powering the HBase use cases at Salesforce.com. Phoenix targets low-latency queries (milliseconds), as opposed to batch operation via map/reduce. License: BSD 3 , .
A schema analyzer for MongoDB. License: MIT , .
Redisson - distributed Java objects (Bloom filter, BitSet, Set, SetMultimap, ScoredSortedSet, SortedSet, Map, ConcurrentMap, List, ListMultimap, Queue, BlockingQueue, Deque, BlockingDeque, Semaphore, Lock, ReadWriteLock, AtomicLong, CountDownLatch, Publish / Subscribe, HyperLogLog), Redis…
Co-Process for backup/recovery, Token Management, and Centralized Configuration management for Cassandra. License: Apache 2 , .
DataStax Java Driver for Apache Cassandra. License: Apache 2 , .
to be the best java client for memcached. License: BSD 4, .
Provide support to increase developer productivity in Java when using MongoDB. Uses familiar Spring concepts such as a template classes for core API usage and lightweight repository style data access. License: Apache 2 , .
Apache Phoenix enables OLTP and operational analytics in Hadoop for low latency applications by combining the best of both worlds, License: Apache 2.
FlexyPool adds metrics and failover strategies to a given Connection Pool, allowing it to resize on demand. License: Apache 2.
Pluggable data administration UI library for Java web applications. License: Apache 2.
JCA-JDBC Driver for Firebird database. http://www.firebirdsql.org/en/jdbc-driver/, . License: GNU Lesser 2.1.
Free universal database manager and SQL client. http://dbeaver.jkiss.org. , . License: GNU 2.
A Java client for Tarantool. License: BSD licenses.
A solid high-performance JDBC connection pool at last. License: Apache 2 , .
MyBatis SQL mapper framework for Java. License: Apache 2 , .
Hibernate's core Object/Relational Mapping functionality. http://hibernate.org/orm/ License: GNU Lesser 2.1, .
OOQ is an innovative solution for a better integration of Java applications with popular databases like Oracle, Microsoft SQL Server, IBM DB2, or SAP Sybase. http://www.jooq.org/ . License: Apache 2 , .
Querydsl is a framework which enables the construction of type-safe SQL-like queries for multiple backends including JPA, MongoDB and SQL in Java. http://www.querydsl.com/ . License: Apache 2 , .
A JPA 2.1 compliant Polyglot Object-Datastore Mapping Library for NoSQL Datastores. License: Apache 2 , .
Simplifies the development of creating a JPA-based data access layer. License: Apache 2 , .
jDBI is designed to provide convenient tabular data access in Java(tm). It uses the Java collections framework for query results, provides a convenient means of externalizing sql statements, and provides named parameter support for any database being used. http://jdbi.org/ .License: Apache 2 , .
ActiveJDBC is a fast and lean Java ORM. License: Apache 2 , .
Concurrent, fast, and fully-featured JDBC connection pool, which provides a non-starvation guarantee for application threads, statement caching, slow SQL queries detection and logging, and Hibernate integration, among other features. License: Apache 2.
Ebean ORM for Java/Kotlin.Fast and simple data access on the JVM. License: Apache 2.
Comprehensive open-source Java persistence solution addressing relational, XML, and database web services. License: Eclipse Public License v1.0 and BSD 3.
Object Relational Mapping Lite (ORM Lite) provides some simple, lightweight functionality for persisting Java objects to SQL databases while avoiding the complexity and overhead of more standard ORM packages. License: ISC.
User-friendly Java ORM with tools. License: Apache 2.
Java Persistence API Implementation. License: Apache 2.
With MetaModel you get a uniform connector and query API to many very different datastore types, including: Relational (JDBC) databases, CSV files, Excel spreadsheets, XML files, JSON files, Fixed width files, MongoDB, Apache CouchDB, Apache HBase, Apache Cassandra, ElasticSearch, OpenOffice.org…
Distributed and fault-tolerant realtime computation: stream processing, continuous computation, distributed RPC, and more. License: Apache 2 , .
OpenRefine is a free, open source power tool for working with messy data and improving it. License: BSD , .
Stream summarizer and cardinality estimator. License: Apache 2 , .
HdrHistogram: A High Dynamic Range (HDR) Histogram: HdrHistogram supports the recording and analyzing of sampled data value counts across a configurable integer value range with configurable value precision within the range. License: BSD 2 , .
DeepDive is a system to extract value from dark data. Like dark matter, dark data is the great mass of data buried in text, tables, figures, and images, which lacks structure and so is essentially unprocessable by existing software. License: Apache 2 , .
Zeppelin, a web-based notebook that enables interactive data analytics. You can make beautiful data-driven, interactive and collaborative documents with SQL, Scala and more. License: Apache 2 , .
Enterprise machine learning platform for prediction and recommendation on Apache Spark. License: Apache 2 , .
Realtime analytics, this includes the core components of Pulsar pipeline. License: GNU 2.0, .
Suro: Netflix's Data Pipeline. Suro is a data pipeline service for collecting, aggregating, and dispatching large volume of application events including log data. License: Apache 2 , .
Annotator components and a scalable integration and deployment framework for Unstructured Information analysis. License: Apache 2.
Apache Storm is a free and open source distributed realtime computation system. Storm makes it easy to reliably process unbounded streams of data, doing for realtime processing what Hadoop did for batch processing. Storm is simple, can be used with any programming language, and is a lot of fun to…
Heron is realtime analytics platform developed by Twitter. It is the direct successor of Apache Storm, built to be backwards compatible with Storm's topology API but with a wide array of architectural improvements. . http://heronstreaming.io License: Apache 2.
h2o = fast statistical, machine learning & math runtime for bigdata. License: Apache 2 , .
The Oryx open source project provides simple, real-time large-scale machine learning / predictive analytics infrastructure. It implements a few classes of algorithm commonly used in business applications: collaborative filtering / recommendation, classification / regression, and clustering.…
Twitter's collection of LZO and Protocol Buffer-related Hadoop, Pig, Hive, and HBase code. License: Apache 2 , .
The Apache Hadoop software library is a framework that allows for the distributed processing of large data sets across clusters of computers using simple programming models. It is designed to scale up from single servers to thousands of machines, each offering local computation and storage.…
MR4C is an implementation framework that allows you to run native code within the Hadoop execution framework. License: GNU Lesser 3, .
JStorm is a distributed and fault-tolerant realtime computation system. Inspired by Apache Storm, JStorm has been completely rewritten in Java and provides many more enhanced features. JStorm has been widely used in many enterprise environments and proved robust and stable. License: Apache 2 , .
Oculus is the anomaly correlation component of Etsy's Kale system. License: MIT , .
Apache DataFu is a collection of libraries for working with large-scale data in Hadoop. The project was inspired by the need for stable, well-tested libraries for data mining and statistics. License: Apache 2 , .
Universal data ingestion framework for Hadoop. License: Apache 2 , .
Apache Flink is an open source stream processing framework with powerful stream- and batch-processing capabilities. License: Apache 2 , .
Oryx 2: Lambda architecture on Apache Spark, Apache Kafka for real-time large scale machine learning. License: Apache 2 , .
SAMOA (Scalable Advanced Massive Online Analysis) is an open-source platform for mining big data streams. License: Apache 2 , .
A set of Java libraries that make using Apache ZooKeeper much easier. License: Apache 2.
Hama is an efficient and scalable general-purpose BSP computing engine. License: Apache 2.
Data management and processing platform for Hadoop. License: Apache 2.
Apache Karaf is an OSGi distribution for server-side applications. License: Apache 2.
Apache Flume is a distributed, reliable, and available system for efficiently collecting, aggregating and moving large amounts of log data from many different sources to a centralized data store. License: Apache 2.
Tajo is an open source big data warehouse system in Hadoop for processing web-scale data sets. License: Apache 2.
Apache Tez is an effort to develop a generic application framework which can be used to process arbitrarily complex directed-acyclic graphs (DAGs) of data-processing tasks and also a re-usable set of data-processing primitives which can be used by other projects. License: Apache 2.
Apache REEF (Retainable Evaluator Execution Framework) is a scale-out computing fabric that eases the development of Big Data applications on top of resource managers such as Apache YARN and Mesos. License: Apache 2.
Apache Pig is a platform for analyzing large data sets on Hadoop. License: Apache 2.
Druid is a fast column-oriented distributed data store. http://druid.io License: Apache 2, .
The Apache Hive data warehouse software facilitates querying and managing large datasets residing in distributed storage. Built on top of Apache Hadoop. https://hive.apache.org/ .License: Apache 2 , .
Apache Kylin is an open source Distributed Analytics Engine to provide SQL interface and multi-dimensional analysis (OLAP) on Hadoop supporting extremely large datasets. License: Apache 2 , .
Elasticsearch real-time search and analytics natively integrated with Hadoop. License: Apache 2 , .
Presto is a distributed SQL query engine for big data. License: Apache 2 , .
With MetaModel you get a uniform connector and query API to many very different datastore types, including: Relational (JDBC) databases, CSV files, Excel spreadsheets, XML files, JSON files, Fixed width files, MongoDB, Apache CouchDB, Apache HBase, Apache Cassandra, ElasticSearch, OpenOffice.org…
Apache Accumulo is based on Google’s BigTable design and is built on top of Apache Hadoop, Zookeeper, and Thrift. Apache Accumulo features a few novel improvements on the BigTable design in the form of cell-based access control and a server-side programming mechanism that can modify key/value…
provides an in-memory data model and persistence for big data. Gora supports persisting to column stores, key value stores, document stores and RDBMSs, and analyzing the data with extensive Apache Hadoop MapReduce support. License: Apache 2.
Apache Giraph is an iterative graph processing system built for high scalability. For example, it is currently used at Facebook to analyze the social graph formed by users and their connections. Лицензия: Apache 2.
Real-time Query for Hadoop. . License: Apache 2.
A platform for visualization and real-time monitoring of data workflows. License: Apache 2 , .
Desktop app to browse and administer your MongoDB cluster. License: Apache 2 , .
The Apache Ambari project is aimed at making Hadoop management simpler by developing software for provisioning, managing, and monitoring Apache Hadoop clusters. Ambari provides an intuitive, easy-to-use Hadoop management web UI backed by its RESTful APIs. License: Apache 2.
Chukwa is an open source data collection system for monitoring large distributed systems. Chukwa is built on top of the Hadoop Distributed File System (HDFS) and Map/Reduce framework and inherits Hadoop’s scalability and robustness. Chukwa also includes a flexible and powerful toolkit for…
Bigtop is an Apache Foundation project for Infrastructure Engineers and Data Scientists looking for comprehensive packaging, testing, and configuration of the leading open source big data components. License: Apache 2.
BookKeeper is a replicated log service which can be used to build replicated state machines. A log contains a sequence of events which can be applied to a state machine. BookKeeper guarantees that each replica state machine will see all the same entries, in the same order. License: Apache 2.
Provides a framework for writing, testing, and running MapReduce pipelines. License: Apache 2.
Apache MRUnit is a Java library that helps developers unit test Apache Hadoop map reduce jobs. License: Apache 2.
Oozie is a workflow scheduler system to manage Apache Hadoop jobs. License: Apache 2.
A machine learning library designed from the ground up to be human friendly. License: Apache 2 , .
Smile (Statistical Machine Intelligence and Learning Engine) is a set of pure Java libraries of various state-of-art machine learning algorithms. Smile is self contained and requires only Java standard library. Hello World examples. License: Apache 2 , .
Deeplearning4J is an Apache 2.0-licensed, open-source, distributed neural net library written in Java and Scala. http://deeplearning4j.org/ .License: Apache 2 , .
Libsvm is a simple, easy-to-use, and efficient software for SVM classification and regression. It solves C-SVM classification, nu-SVM classification, one-class-SVM, epsilon-SVM regression, and nu-SVM regression. License: BSD 3, .
java deep learning algorithms and deep neural networks with gpu acceleration. License: MIT , .
Datumbox is an open-source Machine Learning framework written in Java which allows the rapid development of Machine Learning and Statistical applications. License: Apache 2 , .
The Apache Mahout project's goal is to build an environment for quickly creating scalable performant machine learning applications. https://mahout.apache.org/ .License: Apache 2 , .
Encog is an advanced machine learning framework that supports a variety of advanced algorithms, as well as support classes to normalize and process data. Machine learning algorithms such as Support Vector Machines, Artificial Neural Networks, Genetic Programming, Bayesian Networks, Hidden Markov…
Apache Flink is an open source stream processing framework with powerful stream- and batch-processing capabilities. License: Apache 2 , .
The Apache Hadoop software library is a framework that allows for the distributed processing of large data sets across clusters of computers using simple programming models. It is designed to scale up from single servers to thousands of machines, each offering local computation and storage.…
Apache Spark™ is a fast and general engine for large-scale data processing. Subproject: MLlib. License: Apache 2.
DeepDive is a system to extract value from dark data. Like dark matter, dark data is the great mass of data buried in text, tables, figures, and images, which lacks structure and so is essentially unprocessable by existing software. License: Creative Commons Attribution 4.0.
h2o = fast statistical, machine learning & math runtime for bigdata. License: Apache 2 , .
Java Statistical Analysis Tool, a Java library for Machine Learning. License: GNU 3.
Weka is a collection of machine learning algorithms for data mining tasks. The algorithms can either be applied directly to a dataset or called from your own Java code. Weka contains tools for data pre-processing, classification, regression, clustering, association rules, and visualization. It is…
A free, open-source ontology editor and framework for building intelligent systems. License: BSD 2.
Hierarchical Temporal Memory implementation in Java - an official Community-Driven Java port of the Numenta Platform for Intelligent Computing (NuPIC). License: GNU AFFERO 3.
Java Machine Learning Library (Java-ML). License: GNU 2.
An open source implementation of methods for multi-label classification and evaluation (extension to Weka). License: GNU.
Neuroph is lightweight Java neural network framework. License: Apache 2.
statistics, data mining and machine learning toolbox in Java. License: Apache 2.
flexible, scalable machine learning (ML) language. (incubator project). License: Apache 2.
Object oriented model of partial human brain with 1 theorized common learning algorithm. Work in progress towards a strong emotional AI. License: GNU 3
Open-source software for transferring content between repositories or search indexes License: Apache 2.
A framework for developing Semantic Web and Linked Data applications in Java. License: Apache 2.
Choco is a Free and Open-Source Software dedicated to Constraint Programming. It aims at describing hard combinatorial problems in the form of Constraint Satisfaction Problems and solving them with Constraint Programming techniques. License: BSD.
Java Constraint Programming (JaCoP) solver. License: ?
OptaPlanner is a constraint satisfaction solver. It optimizes business resource planning. Every organization faces scheduling puzzles: assign a limited set of constrained resources (employees, assets, time and money) to provide products or services to customers. License: Apache 2.
Sat4j is a java library for solving boolean satisfaction and optimization problems. It can solve SAT, MAXSAT, Pseudo-Boolean, Minimally Unsatisfiable Subset (MUS) problems. License: GNU Lesser 3 and Eclipse Public 1.0.
Stanford CoreNLP provides a set of natural language analysis tools written in Java. Hello World examples. License: GNU 2, .
The Apache OpenNLP library is a machine learning based toolkit for the processing of natural language text. Hello World examples. License: Apache 2.
LingPipe is tool kit for processing text using computational linguistics. License: AGPL or License: proprietary. or
MALLET is a Java-based package for statistical natural language processing, document classification, clustering, topic modeling, information extraction, and other machine learning applications to text. License: Eclipse Public License v1.0.
This repo is a collection of libraries and conformance tests to standardize parsing of tweet text. It synchronizes development, testing, creating issues, and pull requests for twitter-text's implementations and specification. License: Apache 2.
The NLP4J project (formerly known as ClearNLP) provides a NLP toolkit for JVM languages. This project is currently developed by the NLP Research Group at Emory University. License: Apache 2.
Joshua is an open-source statistical machine translation decoder for phrase-based (new in 6.0), hierarchical, and syntax-based machine translation, written in Java. It is developed at the Human Language Technology Center of Excellence at Johns Hopkins University. License: BSD 2.
Z-MERT is a software tool for minimum error rate training of machine translation systems. License: GNU Lesser General Public License (LGPL).
ClearTK is a framework for developing machine learning and natural language processing components within the Apache Unstructured Information Management Architecture, http://cleartk.github.io/cleartk/ . License: Apache 2.
Apache cTAKES™ is a natural language processing system for extraction of information from electronic medical record clinical free-text. License: Apache 2.
A Natural Language Processing Java software tools. Subproject: Stanford Parser - A statistical parser, Stanford POS Tagger, Stanford Named Entity Recognizer, RegexNER, Word Segmenter,Classifier,EnglishTokenizer,TokensRegex,Temporal Tagger,Pattern-based Information Extraction and…
The Apache Tika toolkit detects and extracts metadata and structured text content from various documents using existing parser libraries. License: Apache 2.
Open Source Speech Recognition Toolkit. License: BSD 2.
CMU ARK Twitter Part-of-Speech Tagger. http://www.ark.cs.cmu.edu/TweetNLP/ License: GNU 2/3, .
Language Categorization for Java: an Open Source library for finding out in which language a text has been written. License: MIT.
Formerly known as JBoss and developed by Red Hat with extensive Java EE support. License: GNU Lesser 2.1, .
High performance non-blocking webserver. License: Apache 2 , .
Robust all-round server for Servlet and JSP. License: Apache 2 , .
Nginx module for embedding Clojure or Java or Groovy programs, typically those Ring based handlers. License: BSD 3 , .
Lightweight, small server, often embedded in projects. License: Eclipse Public 1.0 / Apache 2.0, .
Tomcat plus Java EE. License: Apache 2.
Lightweight, modular server developed by IBM. License: proprietary
GlassFish - World's first Java EE 7 Application Server. License: GNU 2 Or CDDL 1.0.
Java EE Application Server. License: Apache 2.
The Apache Java Enterprise Mail Server (a.k.a. Apache James) is a 100% pure Java SMTP and POP3 Mail server and NNTP News server. We have designed James to be a complete and portable enterprise mail engine solution based on currently available open protocols. License: Apache 2.
Payara Server is an open source middleware platform that supports reliable and secure deployments of Java EE (Jakarta EE) and MicroProfile applications in any environment: on premise, in the cloud or hybrid.CDDL 1.1
Framework for building high performance network applications. License: Apache 2 , .
Socket.IO server implemented on Java. Realtime java framework. License: Apache 2 , .
The Java gRPC implementation. HTTP/2 based RPC http://www.grpc.io/ . License: BSD 3, .
Socket.IO Client Implementation in Java. License: MIT , .
Full-featured Socket.IO Client Library for Java, which is compatible with Socket.IO v1.0 and later. License: MIT , .
TCP/UDP client/server library for Java, based on Kryo. License: BSD 3, .
Asynchronous HTTP and WebSocket client library. License: Apache 2.
Integrates standard Java web-related APIs with Quasar fibers and actors. License: Eclipse Public 1.0.
NIO framework. Used as a network layer in Glassfish. License: GNU 2 and CDDL 1.1.
HTTP+SPDY client. License: Apache 2.
Web server providing both blocking and non-blocking API’s based on NIO. Used as a network layer in WildFly. License: Apache 2.
Apache MINA is a network application framework which helps users develop high performance and high scalability network applications easily. It provides an abstract, event-driven, asynchronous API over various transports such as TCP/IP and UDP/IP via Java NIO. License: Apache 2.
project is responsible for creating and maintaining a toolset of low level Java components focused on HTTP and associated protocols. HTTP transport library including support for asynchronous execution based on Java NIO. License: Apache 2.
High Performance Inter-Thread Messaging Library. License: Apache 2 , .
Real Time communication library using Animated Gifs as a transport. License: Eclipse Public 1.0, .
Efficient reliable UDP unicast, UDP multicast, and IPC message transport. License: Apache 2 , .
Pure Java ZeroMQ. License: GNU 3, .
A high available,high performance distributed messaging system. License: Apache 2 , .
A XMPP server licensed under the Open Source Apache License. License: Apache 2 , .
Java binding for ZeroMQ. License: GNU 3, .
Message broker that implements JMS and converts synchronous to asynchronous communication, License: Apache 2.
Glues together different transport APIs via Enterprise Integration Patterns, License: Apache 2.
High-throughput distributed messaging system, License: Apache 2.
Fast and reliable message broker built on top of Kafka, License: Apache 2.
Clear, concise, modular and made to be embedded, License: Apache 2.
Cross-platform XMPP client library. License: Apache 2 , .
AMQP enterprise messaging implementation. License: Apache 2.
Apache Synapse is a lightweight ESB engine and XML router. License: Apache 2.
Apache ServiceMix is a flexible, open-source integration container that unifies the features and functionality of Apache ActiveMQ, Camel, CXF, and Karaf into a powerful runtime platform you can use to build your own integrations solutions. It provides a complete, enterprise ready ESB exclusively…
An HTTP+HTTP/2 client for Android and Java applications. License: Apache 2 , .
Asynchronous HTTP and WebSocket client library. License: Apache 2.
Java HTTP Request Library. License: MIT . , .
Tiny, easily embeddable HTTP server in Java. License: BSD 3, .
Hhttp-kit is a minimalist, event-driven, high-performance Clojure HTTP server/client library with WebSocket and asynchronous support. License: Apache 2 , .
Mirror of Apache Hadoop ZooKeeper. License: Apache 2 , .
Easy Setup Stub Server. License: MIT , .
A Java event based WebSocket and HTTP server. License: BSD 3, .
Unirest in Java: Simplified, lightweight HTTP client library.. License: MIT , .
ssh, scp and sftp for java. License: Apache 2 , .
Feign makes writing java http clients easier. License: Apache 2 , .
Type-safe REST client. License: Apache 2 , .
Opinionated framework for setting up modern web applications with Jetty, Jackson, Jersey and Metrics. License: Apache 2 , .
Swagger is a specification and complete framework implementation for describing, producing, consuming, and visualizing RESTful web services. http://swagger.io/ License: Apache 2 , .
Hipster stack for Java developers. Spring Boot + AngularJS in one handy generator. License: Apache 2.
JAX-RS reference implementation. License: CDDL 1.0, .
Rest.li is a REST+JSON framework for building robust, scalable service architectures using dynamic discovery and simple asynchronous APIs. License: Apache 2 , .
Spring HATEOAS - Library to support implementing representations for hyper-text driven REST web services. License: Apache 2 , .
Feign makes writing java http clients easier. License: Apache 2 , .
Fully certified and portable implementation of the JAX-RS specification. License: Apache 2.
Thin wrapper on the JBOSS Netty HTTP stack to provide scaling and performance. License: Apache 2.
Framework based on annotation processing and compile-time source generation. License: Apache 2.
Sinatra inspired framework. License: Apache 2.
RESTFul web services based on JAX-RS specification. License: Apache 2.
Apache Olingo is a Java and JavaScript library that implements the Open Data Protocol (OData). Open Data Protocol (OData) is an open protocol which allows the creation and consumption of queryable and interoperable RESTful APIs in a simple and standard way. License: Apache 2.
A simple, secure and extremely fast framework consisting of embedded HTTP server, GUI components and dependency injection. http://www.rapidoid.org/ License: Apache 2, .
This is effectively the missing connector between speaking to a JVM via JMX on one end and whatever logging / monitoring / graphing package that you can dream up on the other end. License: ?, .
Apache Camel is a powerful open source integration framework based on known Enterprise Integration Patterns with powerful Bean Integration. License: Apache 2 , .
Apache CXF is an open source services framework. CXF helps you build and develop services using frontend programming APIs, like JAX-WS and JAX-RS. These services can speak a variety of protocols such as SOAP, XML/HTTP, RESTful HTTP, or CORBA and work over a variety of transports such as HTTP, JMS…
Spring Integration provides an extension of the Spring programming model to support the well-known Enterprise Integration Patterns (EIP). http://projects.spring.io/spring-integration/ License: Apache 2 , .
Nokogiri is an HTML, XML, SAX, and Reader parser with XPath and CSS selector support. License: Apache 2 , .
Scrapes, parses, manipulates and cleans HTML. https://jsoup.org/ . Hello World examples. License: MIT , .
A scalable web crawler framework. License: Apache 2 , .
ANTLR (ANother Tool for Language Recognition) is a powerful parser generator for reading, processing, executing, or translating structured text or binary files. License: BSD 3, .
Elegant parsing in Java and Scala - lightweight, easy-to-use, powerful. License: Apache 2 , .
A pure-Java Markdown processor based on a parboiled PEG parser supporting a number of extensions. License: Apache 2 , .
Highly extensible, highly scalable web crawler for production environment. License: Apache 2.
Simple and lightweight web crawler. License: Apache 2.
Fast JSON Processor , . User guide and Hello World examples. License: Apache 2.
Serializes objects to JSON and vice versa. Good performance with on-the-fly usage, . User guide and Hello World examples . License: Apache 2.
JSON parsing and serializing library based on Jackson's streaming API. Outpeforms GSON & Jackson's library, . User guide and Hello World examples. License: Apache 2.
A reference implementation of a JSON package in Java, . User guide and Hello World examples. License: Crockford's license (MIT License + "Good, not Evil").
A modern JSON library for Android and Java , . User guide and Hello World examples. License: Apache 2
Fast JSON parser for java projects, . User guide and Hello World examples. License: BSD 3.
Similar to GSON but has performance gains if you need to instantiate the library more often. Subprojects: Jackson core Core part of Jackson, Jackson databind Core part of Jackson that defines Streaming API as well as basic shared abstractions, . User guide and Hello World examples. License: Apache…
A simple Java toolkit for JSON. You can use json-simple to encode or decode JSON text, . User guide and Hello World examples. License: Apache 2.
Powerful and easy to use Java to JSON conversion library, http://owlike.github.io/genson/ . User guide and Hello World examples. License: Apache 2.
Java JsonPath implementation, . User guide and Hello World examples. License: Apache 2.
Generates Java types from JSON Schema (or example JSON) and annotates those types for data-binding with Jackson 1.x or 2.x, Gson, etc. , . User guide and Hello World examples. License: Apache 2.
A JSON Schema validation implementation in pure Java, which aims for correctness and performance, in that order, also can generate Java types from JSON Schema or versa versa, . User guide and Hello World examples. License: GNU Lesser 3/Apache 2.
Simple CSV parser with a commercial-friendly license. License: Apache 2.
Powerful CSV parser with support for Dozer, Joda-Time and Java 8. License: Apache 2.
One of the fastest and most feature-complete CSV. Also comes with parsers for TSV and fixed width records. License: Apache 2.
Zipkin is a distributed tracing system. It helps gather timing data needed to troubleshoot latency problems in microservice architectures. License: Apache 2 , .
The official plugin for Facebook in Apache Cordova/PhoneGap. License: Apache 2 , .
Twitter4J is an open-sourced, mavenized and Google App Engine safe Java library for the Twitter API. License: Apache 2 , .
AWS (Amazon Web Services) Usage Tool. License: Apache 2 , .
Twitter common libraries for python and the JVM. License: Apache 2 , .
RocketMQ is a fast, reliable, scalable, easy to use message oriented middleware breeding from alibaba massive messaging business. License: Apache 2 , .
A Java HTTP client for consuming Twitter's Streaming API. License: Apache 2 , .
Allows you to connect your applications with SaaS providers such as Facebook and Twitter. License: Apache 2 , .
XChange is a Java library providing a streamlined API for interacting with 50+ Bitcoin and Altcoin exchanges providing a consistent interface for trading and accessing market data. License: MIT , .
A library for working with Bitcoin. License: Apache 2 , .
OpenCL miner for Bitcoin. License: GNU 3, .
Tools for keeping your cloud operating in top form. Chaos Monkey is a resiliency tool that helps applications tolerate random instance failures. License: Apache 2 , .
AWS Service registry for resilient mid-tier load balancing and failover.. License: Apache 2 , .
Official mirror of the AWS (Amazon Web Services) SDK for Java. License: Apache 2 , .
Syncany is a cloud storage and filesharing application with a focus on security and abstraction of storage. License: GNU 3, .
jclouds is an open source library that helps you get started in the cloud and reuse your java development skills. Our api allows you to freedom to use portable abstractions or cloud-specific features. We support many clouds including Amazon, VMWare, Azure, and Rackspace. License: Apache 2 , .
Elasticsearch is a distributed RESTful search engine built for the cloud. License: Apache 2 , .
AWS (Amazon Web Service) Cloud Plugin for Elasticsearch. License: Apache 2 , .
The IK Analysis plugin integrates Lucene IK analyzer into elasticsearch, support customized dictionary. License: ?, .
Apache CloudStack is an IaaS (“Infrastracture as a Service”) cloud orchestration platform. License: Apache 2.
Apache Stratos is a highly-extensible Platform-as-a-Service (PaaS) framework that helps run Apache Tomcat, PHP, and MySQL applications and can be extended to support many more environments on all major cloud infrastructures. License: Apache 2.
Apache Airavata is a software framework for executing and managing computational jobs and workflows on distributed computing resources including local clusters, supercomputers, national grids, academic and commercial clouds. Airavata is dominantly used to build Web-based science gateways and…
Quarkus is a Cloud Native, (Linux) Container First framework for writing Java applications.
Apache Aurora is a Mesos framework for long-running services and cron jobs. License: Apache 2.
Singularity is a Mesos framework that makes deployment and operations easy. It supports web services, background workers, scheduled jobs, and one-off tasks. License: ?.
A cluster management framework for partitioned and replicated distributed resources. License: Apache 2.
Apache Airavata is a software framework for executing and managing computational jobs and workflows on distributed computing resources including local clusters, supercomputers, national grids, academic and commercial clouds. Airavata is dominantly used to build Web-based science gateways and…
Supports OOXML (XLSX, DOCX, PPTX) as well as OLE2 (XLS, DOC or PPT). License: Apache 2.
API for document format conversion using third-party converters such as MS Word. License: Apache 2.
Docx4j is an open source Java library for manipulating Microsoft OpenXML files (Word docx, Powerpoint pptx, and Excel xlsx) via JAXB. License: Apache 2.
Processes the OpenDocument format. License: GNU or proprietary. and
The Apache Tika toolkit detects and extracts metadata and structured text content from various documents using existing parser libraries. License: Apache 2.
Creates PDF from XSL-FO. License: Apache 2.
Toolbox for creating and manipulating PDF. License: Apache 2.
Simplifies JasperReports. License: GNU Lesser 3.
XML/XHTML and CSS 2.1 renderer. License: GNU Lesser 2.1.
Creates PDF files programmatically but current versions require a license for commercial purposes. License: AGPL or proprietary. or . However, versions upto 4.2.0 were licensed under the business-friendly LGPL. From 2.1.7 the version jumped to the 4 series, one of the main changes was a renaming…
Complex reporting engine. License: GNU Lesser.
Work with native libraries without writing JNI. Also provides interfaces to common system libraries. License: GNU Lesser 2.1 or Apache 2. , .
Work with native libraries without writing JNI. Also provides interfaces to common system libraries. Same goals as JNA, but faster, and serves as the basis for the upcoming Project Panama. License: Apache 2.
Xalan-J is an XSLT processor written in Java. License: Apache 2.
Xerces-J is a validating XML parser written in Java. License: Apache 2.
Conversion from XML to graphical output. License: Apache 2.
Library implementing XML Digital Signature Specification & XML Encryption Specification. License: Apache 2.
Apache VXQuery implements a parallel XML Query processor. License: Apache 2.
Web Service containers that helps users to create, deploy, and run Web Services. Axis2 is a Web Services / SOAP / WSDL engine, the successor to the widely used Apache Axis SOAP stack. License: Apache 2.
Library for developing geospatial applications. License: Apache 2.
GeoHash utilities in Java. License: Apache 2.
Library for developing geospatial applications. Built on top of the Apache SIS project. License: GNU Lesser 2.1.
Library that provides tools for geospatial data. License: GNU Lesser 2.1.
A spatial extension of the H2 database. License: GPL 3.
Library that can assist Java developers in using the GeoHash algorithm. License: Apache 2.
An API of 2D spatial predicates and functions. License: GNU Lesser 3.
Software for the rendering of maps based on OpenStreetMap data. License: GNU Lesser 3.
An open source, reverse HTTP proxy framework written in Java. License: Apache 2 , .
is a free, simple and extensible library for checking the architecture of your Java code. License: Apache 2 , .
Common testing framework. License: Eclipse Public 1.0 , .
Creation of test double objects in automated unit tests for the purpose of TDD or BDD. License: MIT , .
Portable software testing framework for web applications. License: Apache 2 , .
BDD testing framework. Cucumber-JVM is a pure Java implementation of Cucumber that supports the most popular programming languages for the JVM. Hello World examples. License: MIT, .
extensively configurable framework for Behavior-Driven Development (BDD). BDD is an evolution of test-driven development (TDD) and acceptance-test driven design, and is intended to make these practices more accessible and intuitive to newcomers and experts alike. License: BSD 3, .
JUnit-compatible framework featuring an expressive Groovy-derived specification language. License: Apache 2 , .
Firing Range is a test bed for web application security scanners, providing synthetic, wide coverage for an array of vulnerabilities. It can be deployed as a Google App Engine application. License: Apache 2 , .
FitNesse is the fully integrated stand-alone acceptance testing framework and wiki.. License: CPL-1.0, .
Sikuli is a visual technology to automate graphical user interfaces (GUI) using images (screenshots). The current release of Sikuli includes Sikuli Script, a visual scripting API for Jython, and Sikuli IDE, an integrated development environment for writing visual scripts with screenshots easily.…
Matchers that can be combined to create flexible expressions of intent. License: BSD 3, .
Stubbs and mocks web services. License: Apache 2 , .
Testing framework. License: Apache 2 , .
Layout and functional testing framework for websites. License: Apache 2 , .
Fluent assertions that improve readability. License: Apache 2 , .
Google's assertion and proposition framework. License: Apache 2 , .
Functional testing and performance measurements. License: Apache 2.
Integration and functional testing platform for Java EE containers. License: Apache 2.
DSL for synchronizing asynchronous operations. License: Apache 2.
Integration testing framework with focus on client- and serverside messaging. License: Apache 2.
Load testing tool designed for ease of use, maintainability and high performance. License: MIT.
In-memory email server for integration testing. Supports SMTP, POP3 and IMAP including SSL. License: MIT.
Developer-friendly BDD testing framework compatible with JUnit and TestNG. License: MIT.
Mocks static, final methods and more. License: MIT.
Creation of readable and maintainable parametrised tests. License: Apache 2.
Easy Setup Stub Server. License: MIT , .
Fast mutation-testing framework for evaluating fault-detection abilities of existing JUnit or TestNG test-suites. License: Creative Commons License.
Enables mocking of static methods, constructors, final classes and methods, private methods and removal of static initializers. License: Apache 2.
Java DSL for easy testing for REST/HTTP services. License: Apache 2.
Concise API around Selenium to write stable and readable UI tests. License: MIT.
Modular testing library for unit and integration testing. License: Apache 2.
Enabling Test Automation in Java. SeLion builds on top of TestNG and Selenium to provide a set of capabilities that get you up and running with WebDriver in a short time. It can be used for testing web and mobile applications, . License: Apache 2.
Web-automation library for Java. It can be used for automating the use of web pages and for testing web pages. License: MIT.
Published on Maven Central Java Library that compares 2 images with the same sizes and shows the differences visually by drawing rectangles. Some parts of the image can be excluded from the comparison. License: The Unlicense
Captures log entries for unit testing purposes. License: Apache 2 , .
Framework that enables collection of code coverage metrics, using both offline and runtime bytecode instrumentation; prominently used by EclEmma, the Eclipse code-coverage plugin. License: Eclipse Public License v1.0, Apache 2, BSD.
Proprietary code coverage tool by Atlassian that relies on source-code instrumentation, instead of bytecode instrumentation. License: proprietary
Relies on offline (or static) bytecode instrumentation and class loading to collect code coverage metrics. License: GNU 2.
Code coverage tool used in the OpenJDK project's development toolchain. License: GNU 2.
Atlassian's solution with good integration of their other products. You can either apply for an open-source license or buy it.
Hosted services with a limited free plan.
Integration platform for containers. License: Apache 2.
ThoughtWork's open-source solution. License: Apache 2.
Provides server-based deployment services. License: MIT.
JetBrain's CI solution with a free version. License: proprietary
Hudson monitors the execution of repeated jobs, such as building a software project or jobs run by cron. Currently Hudson focuses on the following two jobs: Building/testing software projects continuously and Monitoring executions of externally-run jobs. License: Eclipse Public License v1.0.
Apache Continuum software is an enterprise-ready continuous integration server with features such as automated builds, release management, role-based security, and integration with popular build tools and source control management systems.. License: Apache 2.
Concolic unit testing engine. Automatically generates unit tests using formal methods. License: BSD 2, License: BSD 2.
Pluggable type systems. Includes nullness types, physical units, immutability types and more. License: GNU 2.
Daikon detects likely program invariants and can generate JML specs based on those invariats. License: GNU.
Behavioral interface specification language that can be used to specify the behavior of code modules. It combines the design by contract approach of Eiffel and the model-based specification approach of the Larch family of interface specification languages, with some elements of the refinement…
JVM formal verification tool containing a model checker and more. Created by NASA. License: NASA OPEN SOURCE AGREEMENT VERSION 1.3
Concolic unit testing engine that automatically generates unit tests. Concolic execution combines randomized concrete execution with symbolic execution and automatic constraint solving. License: proprietary.
Detects nonconformances between code and JML specification through the feedback-directed random tests generation, and suggests a likely cause for each nonconformance detected. License: GNU 3.
The KeY System is a formal software development tool that aims to integrate design, implementation, formal specification, and formal verification of object-oriented software as seamlessly as possible. Uses JML for specification and symbolic execution for verification. License: GNU.
Translates JML specifications into SMT-LIB format and passes the proof problems implied by the program to backend solvers. License: GNU 2 and Eclipse Public License v1.0.
Supports a lot of JVM languages and provides good options for Android development. The commercial edition targets the enterprise sector. http://www.jetbrains.com/idea/ License: Apache 2 , .
Vim emulation plug-in for IDEs based on the IntelliJ platform. License: GNU 2, .
RStudio is an integrated development environment (IDE) for R. License: GNU AGPLv3, .
Vim-like editing in Eclipse. License: GNU 3.0, .
Jeeeyul's Eclipse Themes allows you to customize every single details of Eclipse's appearance. License: Eclipse Public 1.0, .
Color themes for Eclipse. License: Eclipse Public 1.0, .
Expose eclipse features inside of vim. License: GNU 3, .
JetBrains Meta programming System. Design your own Domain Specific Language with full development environment. Get code editor with completion, semantics and type checking with one click. Write generators to compile your DSL into multiple target languages, such as Java, C, XML, and many more.…
Markdown language support for IntelliJ IDEA. License: Apache 2 , .
Established, open-souce project with support for lots of plugins and languages. License: Eclipse Public License v1.0.
Declarative build and dependency management which favors convention over configuration. It might be preferable to Apache Ant which uses a rather procedural approach and can be difficult to maintain. http://maven.apache.org License: Apache 2 , .
Build tool from Google that builds code quickly and reliably. http://bazel.io License: Apache 2 , .
Incremental builds which are programmed via Groovy instead of declaring XML. Works well with Maven's dependency management. http://gradle.org/ License: Apache 2 , .
pache Ant is a Java library and command-line tool whose mission is to drive processes described in build files as targets and extension points dependent upon each other. Subproject: Apache AntUnit - testing Ant task, Apache Compress Ant Library - support additional archive formats, Apache Ivy -…
A fast build system that encourages the creation of small, reusable modules over a variety of platforms and languages. License: Apache 2 , .
The Build Artifact Repository Manager. Apache Archiva™ is an extensible repository management software that helps taking care of your own personal or enterprise-wide build artifact repository. It is the perfect companion for build tools such as Maven, Continuum, and ANT. License: Apache 2.
Configuration library for JVM languages. License: Apache 2 , .
Reduces boilerplate of properties. License: BSD 3.
Library for configuration management API. Archaius includes a set of configuration management APIs used by Netflix. License: Apache 2 , .
Pluggable data administration UI library for Java web applications. License: Apache 2.
A collection of libraries and tools that enable contribution and release processes for software projects. License: Apache 2.
Version control for binaries which handles the publishing. Can also be used with Maven or Gradle and has a free plan for open-source software or several business plans. License: proprietary
Simple and powerful packaging and deployment. A fat JAR on steroids or a "Docker for Java" that supports JVM-optimized containers. . License: Eclipse Public License v1.0.
Largest binary component repository available as a free service to the open-source community. Default used by Apache Maven and available in all other build tools. License: proprietary
Setup authoring tool for cross-platform deployments. License: Apache 2 , ).
Easy to use package repository for GitHub. Builds Maven/Gradle projects on demand and publishes ready-to-use packages. License: Apache 2 , ).
Wraps JARs in lightweight and native Windows executables. License: BSD 3 or MIT.
Binary management with proxy and caching capabilities. License: proprietary
Packs JARs, assets and the JVM for native distribution on Windows, Linux and Mac OS X. License: Apache 2.
Docker container orchestration platform. License: Apache 2 , .
A memory leak detection library for Android and Java. License: Apache 2 , .
Expose metrics via JMX or HTTP and can send them to a database. License: Apache 2.
Fork of tagtraum industries' GCViewer. Tagtraum stopped development in 2008, I aim to improve support for Sun's / Oracle's java 1.6+ garbage collector logs (including G1 collector). License: GNU Lesser 2.1, .
Log analyser / visualiser for Java HotSpot JIT compiler. Inspect inlining decisions, hot methods, bytecode, and assembly. View results in the JavaFX user interface. License: BSD 2, .
Pinpoint is an open source APM (Application Performance Management) tool for large-scale distributed systems written in Java. License: Apache 2 , .
Logs and records platform JVM stalls. License: BSD 2.
Microbenchmarking tool for the JVM. License: GNU 2.
Utilities for latency measurement and reporting. License: BSD 2.
Visual interface for detailed information about running applications. License: GNU 2 with the Classpath Exception.
Commercial profiler. License: proprietary
Commercial profiler. License: proprietary
A commercial profiler for Java Web applications. License: proprietary
Integrates other analysis components via plugins and provides an overview of the metrics over time. http://www.sonarqube.org License: GNU Lesser 3, .
Catches common programming mistakes as compile-time errors. License: Apache 2 , .
OpenGrok is a fast and usable source code search and cross reference engine, written in Java. It helps you search, cross-reference and navigate your source tree. It can understand various program file formats and version control histories like Mercurial, Git, SCCS, RCS, CVS, Subversion, Teamware,…
Static analysis of coding conventions and standards. License: GNU Lesser 2.1.
Static analysis of bytecode to find potential bugs. License: GNU Lesser.
Static code analysis with Neo4J-based query language. License: GNU 3.
Source code analysis for finding bad coding practices. License: BSD 4.
Commercial performance monitor. License: proprietary
Performance monitoring and profiling. License: Apache 2.
This is effectively the missing connector between speaking to a JVM via JMX on one end and whatever logging / monitoring / graphing package that you can dream up on the other end. License: ?, .
Tool for monitoring applications running on the JVM. License: Apache 2.
Open source Java APM. License: Apache 2.
Commercial performance monitor. License: proprietary
Commercial performance monitor with distributing transaction tracing for JVM apps. License: proprietary
Root cause automation in production. License: proprietary
The Dynamic Code Evolution Virtual Machine (DCE VM) is a modification of the Java HotSpot(TM) VM that allows unlimited redefinition of loaded classes at runtime. License: GNU 2
This project is a fork of original DCEVM project. The purpose of the project is to maintain enhanced class redefinition functionality for OpenJDK HotSpot 7/8 and Oracle JVM. License: GNU 2
Java unlimited redefinition of classes at runtime. License: GNU 2
Reload code changes instantly. Skip the build and redeploy process. JRebel reloads changes to Java classes, resources, and over 90 frameworks. License: proprietary
Java agent that enables class reloading in a running JVM. License: Apache 2
A Doclet that allows the use of Markdown (Pegdown) and PlantUML in JavaDoc comments. License: GPL 3.0, .
A Java to iOS Objective-C translation tool and runtime. License: Apache 2 , .
A Java 8 Jar & Android APK Reverse Engineering Suite (Decompiler, Editor, Debugger & More). License: GNU 3, .
Java runtime metadata analysis, in the spirit of Scannotations. Reflections scans your classpath, indexes the metadata, allows you to query it on runtime and may save and collect that information for many modules within your project. License: WTFPL, .
Java Version Manager inspired by nvm (Node.js). The goal is to provide unified pain-free experience of installing (and switching between different versions of) JDK. License Apache 2 , .
Generates postman collection, environment and integration tests from java code. License Apache 2 , .
Early access releases of JDK 9. License: GNU 2.
Open-source implementation for Linux. License: GNU 2.
OpenJDK builds for Windows, Linux, and Mac OS X through Java 8. License: GNU 2.
Early access OpenJDK 9 builds for Windows, Linux, and Mac OS X. License: GNU 2.
The Clojure programming language. License: Apache 2 , .
The Kotlin Programming Language. License: Apache 2 , .
Main repository for Go Continuous Delivery. License: Apache 2 , .
The Groovy programming language. License: Apache 2 , .
An alternative to Zend PHP, like JRuby and Jython only for PHP. License: Apache 2 , .
A JVM-based Erlang VM. License: Apache 2 , .
Google Go language IDE built using the IntelliJ Platform. License: Apache 2 , .
A port of the Processing visualization language to JavaScript. License: MIT , .
PySonar2 is a type inferencer and indexer for Python, which performs sophisticated interprocedural analysis to infer types. License: GNU GNU AGPLv3, .
The YUI Compressor is a JavaScript compressor which, in addition to removing comments and white-spaces, obfuscates local variables using the smallest possible variable name. License: BSD, .
A JavaScript checker and optimizer. License: Apache 2 , .
"Maven-node-grunt-gulp-npm-node-plugin to end all maven-node-grunt-gulp-npm-plugins." A Maven plugin that downloads/installs Node and NPM locally, runs NPM install, Grunt, Gulp and/or Karma. License: Apache 2 , .
ECMAScript runtime for the JVM. License: Apache 2 , .
A system for distributing and managing secrets. License: Apache 2 , .
Job scheduler and runbook automation. Enable self-service access to existing scripts and tools. License: Apache 2 , .
KeyBox is a web-based SSH console that centrally manages administrative access to systems. Web-based administration is combined with management and distribution of user's public SSH keys. License: Apache 2 , .
An open source multi-modal trip planner. License: Apache 2 , .
Netflix Application Monitoring Library. License: Apache 2 , .
Jitsi is an audio/video and chat communicator that supports protocols such as SIP, XMPP/Jabber, AIM/ICQ, IRC, Yahoo! and many other useful features. License: Apache 2 , .
ZooKeeper co-process for instance monitoring, backup/recovery, cleanup and visualization. License: Apache 2 , .
The HTML5/JavaScript Guacamole client, its containing web application, and related components. License: MIT , .
Simple stock trading system that optimizes its parameters with particle swarm optimization. License: MIT , .
Java REPL is a simple Read-Eval-Print-Loop for Java language. License: Apache 2 , .
An alerting dashboard for Graphite. License: Apache 2 , .
Open source routing library and server using OpenStreetMap. License: Apache 2 , .
Turn's BitTorrent Java library (tracker and client). License: Apache 2 , .
Official GeoServer repository. License: GNU 2.0, .
Style and Grammar Checker for 25+ Languages. License: GNU Lesser 2.1, .
Video conferencing, instant messaging, white board and collaborative document editing application. License: Apache 2.
The Minecraft Mod API. License: GNU 2, .
Terasology - open source voxel world. The Terasology project was born from a Minecraft-inspired tech demo and is becoming a stable platform for various types of gameplay settings in a voxel world. License: Apache 2 , .
Modifications to the Minecraft base files to assist in compatibility between mods. License: GNU AGPLv2.1, .
A Forge mod that implements SpongeAPI. License: MIT , .
BuildCraft — mod for Minecraft. License: Apache 2 , .
pahimar Equivalent-Exchange-3. Mods for Minecraft. License: Apache 2 , .
A Minecraft plugin API. License: Apache 2 , .
An in-game voxel map editor for Minecraft. License: GNU Lesser 3, .
Essentials - Minecraft server command mod - Adds over 100 commands for use in-game to help manage a server. License: GNU 3, .
An open-source server for the Bukkit Minecraft modding interface. License: MIT , .
Tribal Trouble is a realtime strategy game released by Oddlabs in 2004. In 2014 the source was released under GPL2 license. License: GNU 2, .
Design patterns implemented in Java. License: MIT , .
Demonstrates the capabilities of the Spring MVC web framework through small, simple examples. License: Apache 2 , .
Java EE 7 Samples. License: MIT/CDDL/GPLv2, .
Solutions for some common algorithm problems written in Java. License: Apache 2 , .
Fast and stable sort algorithm that uses O(1) memory. License: unlicense.org, .
A sample Spring-based application. License: Apache 2 , .
You are looking for examples, code snippets, sample applications for Spring Integration? This is the place. License: Apache 2 , .
Algorithms and Data Structures implemented in Java. License: Apache 2 , .
The quickstarts demonstrate JBoss EAP, Java EE 7 and a few additional technologies. They provide small, specific, working examples that can be used as a reference for your own project. License: Apache 2 , .
Example code from Learning Spark book. License: MIT , .
7GUIs is a GUI programming usability benchmark. License: ?, .
Spring Data Example Projects. License: Apache 2 , .
Modern Java - A Guide to Java 8. License: MIT.
community library of micro Java code solutions for popular issues.
Benchmark comparing serialization libraries on the JVM. License: ?, .
Yahoo! Cloud Serving Benchmark. License: Apache 2 , .
Gitblit is an open source, pure Java Git solution for managing, viewing, and serving Git repositories. It can serve repositories over the GIT, HTTP, and SSH transports; it can authenticate against multiple providers; and it allows you to get up-and-running with an attractive, capable Git server in…
BTC + BitHub = An experiment in funding privacy OSS. BitHub is a service that will automatically pay a percentage of Bitcoin funds for every submission to a GitHub repository. License: ?, .
Subreddit for the Java community.
Question/answer platform.
Virtual Java User Group.
Community to discuss Java projects and share solutions.
Android developer portal with tools, libraries, and apps.
rust-unofficial/awesome-rust
A curated list of Rust code and resources.
jaywcjlove/awesome-mac
This project is dedicated to collecting high-quality macOS software and organizing them systematically by different categories for easy search and use.
vinta/awesome-python
The definitive list that answers "I want to do X in Python, which tool should I use?"
fffaraz/awesome-cpp
A curated list of awesome C++ (or C) frameworks, libraries, resources, and shiny things. Inspired by awesome-... stuff.
avelino/awesome-go
A curated list of awesome Go frameworks, libraries and software
ziadoz/awesome-php
A curated list of amazingly awesome PHP libraries, resources and shiny things.