Normalize browsers' default style. Repo | #CSS

Modern CSS reset. Repo | #CSS

Collection of best-practice CSS selectors. | #CSS

Elegant styles for all native HTML elements, dark mode automatically enabled. Demo, Docs, Repo | #SCSS

Minimalist stylesheet for HTML elements. Docs, Repo | #CSS

Minimal classless CSS framework/theme. Demo, Repo | #SCSS

Lightweight, classless CSS framework. Demo, Docs, Repo | #CSS

CSS framework for dummies, without classes. Repo | #SCSS

Set of small, responsive CSS modules that you can use in every web project. Demo, Docs, Repo | #CSS

Lightweight and beautiful library. Demo, Docs, Repo | #SCSS

Really small CSS framework. Demo, Docs, Repo | #CSS

The most popular HTML, CSS, and JavaScript framework for developing responsive, mobile first projects on the web.…

Modern CSS framework based on Flexbox. Demo, Docs, Repo | #Sass

The most advanced responsive front-end framework in the world. Demo, Docs, Repo | #SCSS

Lightweight and modular front-end framework for developing fast and powerful web interfaces. Demo, Docs, Repo | #LESS…

CSS framework that powers GitHub's front-end design. Docs, Repo | #SCSS

Component library behind IBM's Carbon Design System. Docs, Repo | #SCSS

Components used by U.S. federal government websites. Docs, Repo | #SCSS

Build beautiful websites fast, with concise HTML, intuitive javascript, and simplified debugging. Docs, Repo | #LESS

Component and utility centric SCSS framework designed for rapid prototyping. Demo, Docs, Repo | #SCSS

Simple, extensible CSS framework. Written by the Canonical Web Team. Demo, Docs, Repo | #SCSS

UI framework for enterprise web applications. Demo, Docs, Repo | #SCSS #LESS

UI components used by Stack Overflow. Docs, Repo | #LESS

Simple CSS foundation with responsive typography and input styling. Docs, Repo | #PostCSS

Build material design interfaces in record time without stress for devs. Repo | #CSS

Responsive front-end library based on Google's Material Design. Docs, Repo | #SCSS

Utility-first CSS framework for rapid UI development. Docs, Repo | #CSS

CSS custom properties to help accelerate adaptive and consistent design. Demo, Docs, Repo | #CSS #PostCSS

NES-style CSS Framework. Demo, Docs, Repo | #SCSS

CSS library for building interfaces that look like Windows 98. Repo | #CSS

Style your webpage like Edward Tufte’s handouts. Repo | #CSS

Modern framework to print the web correctly. Demo, Docs | #SCSS

Design system for building retro Apple interfaces. Repo | #PostCSS

CSS library for building interfaces that look like Windows XP. Repo | #PostCSS

Library to create MS-DOS interfaces. Demo, Docs | #SCSS

CSS library for building interfaces that look like Windows 7. Repo | #PostCSS

Email framework for developing responsive and lightweight email templates. Docs, Repo | #SCSS

CSS framework designed for building any kind of radial UI. Docs, Repo | #SCSS

User interface is the language of the web. Docs, Repo | #LESS

Modular and customizable Material Design UI components for the web. Demo, Docs, Repo | #SCSS

Quickly build and design new UI without writing CSS. Demo, Docs, Repo | #CSS

Lightweight Sass tool set. Docs, Repo | #SCSS

Just-add-CSS collection of styles to make simple websites just a little nicer. Repo | #CSS

The best-practices CSS foundation. Repo | #CSS

Tiny little reset that you can use as the basis of your CSS projects. Repo | #CSS

Tiny modern CSS reset. Repo | #Sass

Start your project with a remedy for the technical debt of CSS. | #CSS

Open source modular toolkit providing great structure for building websites quickly with a scalable and maintainable…

Give up the bloat. Stop tripping over your classes. Be concise. Docs, Repo | #SCSS

Powerful, accessible, developer friendly framework for building responsive websites. Docs, Repo | #SCSS