Argh! A minimalist argument handler.

Argument Parser for Modern C++.

A simple header-only C++ argument parser library.

Command line parser for C++17.

CLI11 is a command line parser for C++11 and beyond.

Powerful & Expressive Argument Parsing for Modern C++.

Lightweight C++ GNU style option parser library.

Create fully functional CLIs using function signatures.

Simple, extensible, header-only C++17 argument parser.

Parse command line arguments by defining a struct.

Audio playback and capture library written in C, in a single source file.

Minimalistic MP3 decoder single header library.

Microbenchmarking for Modern C++.

Simple, fast, accurate microbenchmarking for C++11.

A small microbenchmarking library for C++11.

Implement binary communication protocols in >=C++11.

Gzip header-only C++ library.

Binary Interpolative Coding algorithm.

A C++ header-only ZLib wrapper.

Multithreaded programming.

Modern C++ Parallel Task Programming.

Better Code: Concurrency - Sean Parent.

A header-only C++ library for task concurrency.

Modern C++ taskpool.

Modern C++20 thread-pool.

Encode/decode base64, base64url, base32, etc.

C++11 header-only message digest library.

Header-file-only, SHA256 hash generator in C++.

Header only C++ AES cipher library.

A C++17 cross-platform implementation for UUIDs.

Oracle, ODBC and DB2-CLI Template Library.

C++20 bencode library.

JSON parsing, serialization, inspection and modification.

Header-only library for parsing TOML.

Fast CSV parser and writer for Modern C++.

Reading, writing, and analyzing CSV files.

Static JSON parsing in C++.

Fast library for reading CSV files.

Extremely fast just one allocation and zero copy JSON parser.

Extremely fast, in memory, JSON and interface library for modern C++.

This is a header only C++ version of inih.

JSON for Modern C++.

High performance, single header only to serialize and deserialize JSON to C++ structs.

Construct JSON and JSON-like data formats.

Bare minimal CSV stream based on C++ file streams.

a header-file-only, JSON parser serializer in C++.

A C++ XML processing library with a DOM-like interface and XPath 1.0 support.

C++ CSV parser library.

A fast JSON parser/generator for C++.

RapidXML fork; XML namespacing, per-element parsing, etc.

Parsing gigabytes of JSON per second.

Read and write INI-style configuration files.

C++ header-only JSON library.

TOML for Modern C++.

TOML config file parser and serializer for >=C++17.

A really stupid INI file format for C++11.

JSON Schema validation.

A header-only C++ library converts XML to JSON.

A toolkit for real-world machine learning and data analysis.

Use Keras models in C++.

Incremental decision tree in C++17.

Fast approximate nearest neighbors.

A header-only C++ library for deep neural networks.

mlpack: a fast, header-only C++ machine learning library.

Nearest Neighbor (NN) search with KD-trees.

Dependency-free deep learning framework in C++14.

Creating, displaying, iterating and manipulating dates.

Pretty-printing of any container in C++(0x).

A safe and fast high-level and low-level character input/output C++20 library.

A modern formatting library.

Pretty Printer for Modern C++.

A fast formatting library for C++14.

Table Maker for Modern C++.

Simplest C++ header-only LINQ template library.

Compressed bit-vectors, logical operations, memory compact containers.

Fast multi-producer, multi-consumer lock-free concurrent queue.

The C++17 header-only dynamic bitset.

Constexpr alternative to gperf for C++14 users.

Fast hash map and hash set using hopscotch hashing.

Postmodern immutable and persistent data structures.

A bounded multi-producer multi-consumer concurrent queue.

Lightweight outcome and result.

Very fast and memory-friendly hashmap and btree containers.

Blazing fast queries and updates over billions of items using orders of magnitude less memory than other containers.

Fast & memory efficient hashtable based on robin hood hashing.

Fast hash map and hash set using robin hood hashing.

Small vector. Small flat map/multimap/set/multiset (ordered and unordered). C++11.

Implementations of the main STL containers optimized for the case when they are small.

Fast and highly customisable C++20 trie implementation.

A beautiful stack trace pretty printer for C++.

A deep learning engine in C++20.

C++17 inversion of control and dependency injection container library.

Mediator pattern event bus for C++.

Event Dispatcher and callback list for C++.

Callbacks at a specified time interval.

C++ Simplistic Binary Stream.

Cross-platform implementation of std::filesystem for C++11/14/17.

Glob for C++17.

P1031 low-Level file i/o and filesystem library.

Cross-platform C++11 memory mapped file IO.

Memory-mapped files for C++.

Lightweight, portable C directory and file reader.

Functional Programming Library for C++.

Postmodern immutable and persistent data structures.

Redux-like unidirectional data-flow for C++.

Easy Guile Scheme C++ bindings.

Transducers (from Clojure) in C++.

Immediate-mode camera for your graphics demos.

Marching cubes implementation.

Process polygonal and polyhedral meshes.

A Simple C Hot Reload Header-only Library.

Modern C++ swizzling header-only library.

Fast Polygon triangulation.

Entity component system (ECS) and much more.

OpenGL Mathematics (GLM).

🚀 Making multi-player gamedev simpler since 2017.

👾 CPU Vector Graphics Engine (No FPU or std-lib needed).

Modern ray tracing kernel.

Thread Scheduling, Rendering, and so on.

Extensible, cross-platform OpenGL loader.

Cross-platform libraries for C and C++.

Single-file public domain libraries.

Swarming (flocking) library for real-time applications.

Tiny Differentiable Simulator is a header-only C++ physics library with zero dependencies.

C++11 tiny glTF 2.0 library.

A modern C++ tweening library.

Take the pain out of Vulkan.

Header only mesh voxelizer in c99.

Parallel programming library.

Vulkan-based library that provides a CUDA Runtime API interface for writing GPU-accelerated applications.

Elegant kernel launch, debug-friendly memory accessor, automatic CudaGraph generation & updating for CUDA.

Graph Representation and Algorithms Library >= C++17

A general-purpose lightweight C++20 graph library.

A modern C++17/20 wrapper library for SDL2.

The smallest header-only GUI library(5 KLOC) for all platforms.

Immediate mode cross-platform GUI library.

C++11 native Win32 GUI library.

A C++11 message passing library based on the Message Passing Interface standard.

Modern (c++17), Cross-platform Http Framework.

A C++11 Cross platform HTTP/HTTPS library.

Create and validate JSON web tokens.

Asynchronous HTTP/WebSocket server C++14 library

Modern c++ middleware framework for http(http/https)/websocket(ws/wss).

libfv is C++20 header-only network library, support TCP/SSL/Http/websocket server and client

Cross-platform network interface addresses without name lookups in C++14.

Simple and Fast header only Bitmap (BMP) library.

Cool Image, one file: full featured image processing.

Colors, Color space converters for RGB, HSL, XYZ, Lab, etc.

Color manipulation/conversion for different types and formats.

NanoPM, single header only PatchMatch.

2D Noise generation for C++17 and later.

A modern, type-safe, C++14 wrapper for JNI.

Seamless operability between C++11 and Python.

Simple C++11 friendly bindings to Lua.

Sol3 (sol2 v3.0) - a C++ <-> Lua API wrapper with advanced features and top notch performance.

Bind C++ functions and classes into V8 JavaScript engine.

Add a command interpreter (eg., REPL) to any C++ program.

Single header C++ logging library.

Portable, simple and extensible C++ logging library.

Fast C++ logging library.

Solve large sparse linear systems with algebraic multigrid method.

FFT library.

Template library for linear algebra.

C++ Mathematical Expression Toolkit.

Fixed-point math library.

Fast DSP framework, FFT, Sample Rate Conversion, etc.

Methods to efficiently encode/decode Morton codes in/from 2D/3D coordinates.

Short vector math library for C++.

C++ plotting library built on the popular matplotlib.

Data visualization for simulations (C++20).

A 2D matrix lib in C++20.

C++ implementation of the Python Numpy library.

Random for modern C++ with convenient API.

A header-only C++ library for large scale eigenvalue problems.

Universal Number Arithmetic.

Incremental garbage collector.

C++ mocking made easy.

C++14 mocking framework.

Asio C++ Library.

Asynchronous gRPC with Asio/unified executors.

Cross-platform C++ TCP network library.

Header-only C++ binding for libzmq.

Network packet processing and indexing.

libuv wrapper in modern C++.

C++ library for numerical optimization.

The Modular Lexical Analyser Generator.

C++20 libraries for doing pattern matching using Parsing Expression Grammars

The Modular Parser Generator.

PEG (Parsing Expression Grammars) library.

A C++17 embedded domain specific language for expressing parsers as extended PEG.

Parsing Expression Grammar Template Library.

Move #ifdefs out of your code.

C++ compile-time enum to string, iteration.

Static reflection for enums.

Macro-free runtime reflection system.

Nameof operator for modern C++.

Compile-time reflection library.

A miniature library for struct-field reflection.

A Compile time regular expression matcher.

A ECMAScript (JavaScript) compatible regular expression engine.

Small library for Lie theory.

Serialization library written in C++17.

A C++11 library for serialization.

Transparent serialization/deserialization.

Automatic (de)serialization of C++ types to/from JSON.

A C++11 (de)serialization library with support for binary/text/json archives.

simple, high-performance, zero-copy C++ serialization & reflection library.

Low-level SIMD library.

Implementations of SIMD instruction sets.

Fundamental C++ SIMD types for Intel CPUs.

Easily managing set of flags.

Modern typelist for C++20

C++11/14/17 std::expected.

Expected objects in C++11 and later.

A C++20 library for sequence-orientated programming.

ISO C++ Guidelines Support Library (GSL) by Microsoft.

ISO C++ Guidelines Support Library (GSL).

Your standard library for metaprogramming.

Standard-library-like containers and extensions.

Lightweight Error Augmentation Framework.

Unified Executors

A lightweight pattern-matching library for C++17 with macro-free APIs.

C++11 metaprogramming library.

Range-based goodness for C++17.

Numeric algorithms for C++20 Ranges.

C++11/14/17 std::optional.

A C++17-like optional for C++98/11 and later.

Range library for C++14/17/20.

Tanges features for c+23 ported to C++20.

A C++20-like span for C++98/11 and later.

A C++17-like string_view for C++98/11 and later.

Alternative to the C++ switch statement.

A C++17-like variant for C++98/11 and later.

Readable type-safe C++ interfaces for common Windows coding patterns.

High-performance hierarchical finite state machine framework.

Finite state machine library based on the boost hana.

A simple C++ finite state machine library.

State machine library for C, C++, C#, Java, JavaScript, Python, VB.Net.

C++ template metaprogramming FSM.

Multi-dimensional generalized histograms.

Kalman Filtering Library (EKF, UKF) based on Eigen3.

Statistical distribution functions.

UTF-8/16/32 for Windows/Linux/MacOs.

String matching using wildcards.

A Template Engine for Modern C++.

Activity Indicators for Modern C++.

A Minimal library for terminal goodies 💄✨.

Print colored messages to the terminal.

Native ApprovalTests for C++.

Test framework for unit-tests, TDD and BDD.

The fastest feature-rich C++11/14/17/20 testing framework.

Test framework for unit-tests.

Tiny framework for unit-tests, TDD and BDD.

Lightweight C++20 testing framework.

UT: C++20 μ(micro)/Unit Testing Framework.

C++17 Unicode library.

Unicode algorithms for C++17.

Run-time unit representation and conversion.

Compile-time dimensional analysis and unit/quantity manipulation.

Dimensional analysis and unit conversion library.

Type safety and user defined literals for physical units.

C++ library for data validation.

Micro web framework inspired by Python Flask.