troxler/awesome-css-frameworks

General Purpose

Cirrus - Component and utility centric SCSS framework designed for rapid prototyping.
Demo, Docs, Repostars843 | #CSS

Pico.css - Elegant styles for all native HTML elements, dark mode automatically enabled.
Demo, Docs, Repostars547 | #SCSS

Stalled Development

Materialize - CSS framework based on material design.
Demo, Docs, Repostars38.6k | #SCSS

Class-less

Water.css - Just-add-CSS collection of styles to make simple websites just a little nicer.
Repostars6.5k | #CSS

Class-less

awsm.css - CSS library for semantic HTML markup without classes, attributes, etc.
Demo, Repostars1.3k | #SCSS

Base / Reset / Normalize

normalize.css - Modern, HTML5-ready alternative to CSS resets.
Repostars45.7k | #CSS

minireset.css - Tiny modern CSS reset.
Repostars2.4k | #Sass

Very Lightweight

Milligram - Minimalist CSS framework.
Demo, Docs, Repostars9.5k | #Sass

General Purpose

Bootstrap - The most popular HTML, CSS, and JavaScript framework for developing responsive, mobile first projects on the web.
Demo, Docs, Repostars153.6k | #SCSS

Bulma - Modern CSS framework based on Flexbox.
Demo, Docs, Repostars44.5k | #Sass

Carbon Components - Component library behind IBM's Carbon Design System.
Docs, Repostars4.8k | #SCSS

Base - Rock solid, responsive HTML/CSS framework.
Docs, Repostars1.2k | #SCSS #LESS

Foundation - The most advanced responsive front-end framework in the world.
Docs, Repostars29.2k | #SCSS

Utility-based

Tachyons - Quickly build and design new UI without writing CSS.
Demo, Docs, Repostars10.9k | #CSS

Specialized

Bojler - Email framework for developing responsive and lightweight email templates.
Docs, Repostars914 | #SCSS

Stalled Development

Flexbox Grid - Grid based on CSS3 flexbox.
Repostars9.3k

Basscss - Low-level CSS toolkit.
Repostars5.7k

mini.css - Minimal, responsive, style-agnostic CSS framework.
Docs, Repostars2.9k | #SCSS

Mobi.css - Lightweight, scalable, mobile-first CSS framework.
Docs, Repostars2.3k | #CSS

Concise CSS - Give up the bloat. Stop tripping over your classes. Be concise.
Docs, Repostars944 | #SCSS

Responsive Boilerplate - Powerful, accessible, developer friendly framework for building responsive websites.
Docs, Repostars811 | #SCSS

Stalled Development

Propeller - Front-end responsive framework based on Google's Material Design standards & Bootstrap.
Docs, Repostars1.1k | #SCSS

Wing - Beautiful CSS framework designed for minimalists.
Docs, Repostars2k | #Stylus

General Purpose

Fomantic-UI - Build beautiful websites fast, with concise HTML, intuitive javascript, and simplified debugging.
Docs, Repostars2.7k | #LESS

Stalled Development

Semantic UI - User interface is the language of the web.
Docs, Repostars49.6k | #LESS

Base / Reset / Normalize

Natural Selection - Collection of best-practice CSS selectors.
| #CSS

Specialized

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

Class-less

MVP.css - Minimalist stylesheet for HTML elements.
Docs, Repostars3.7k | #CSS

Base / Reset / Normalize

modern-css-reset - Tiny little reset that you can use as the basis of your CSS projects.
Repostars2.1k | #CSS

Specialized

98.css - CSS library for building interfaces that look like Windows 98.
Repostars6.2k | #CSS

Class-less

sakura - Minimal classless CSS framework/theme.
Demo, Repostars3.2k | #SCSS

Marx - Classless CSS reset.
Docs, Repostars1.5k | #SCSS #Stylus

Tacit - CSS framework for dummies, without classes.
Repostars1.4k | #SCSS

Stalled Development

Neat - Lightweight and flexible Sass grid.
Demo, Docs, Repostars4.5k | #SCSS

General Purpose

Primer - CSS framework that powers GitHub's front-end design.
Docs, Repostars10.5k | #SCSS

Blaze UI - Open source modular toolkit providing great structure for building websites quickly with a scalable and maintainable foundation.
Demo, Docs, Repostars1.5k | #SCSS

Base / Reset / Normalize

ress - Modern CSS reset.
Repostars1.7k | #CSS

General Purpose

PatternFly - UI framework for enterprise web applications.
Demo, Docs, Repostars405 | #SCSS #LESS

General Purpose

turretcss - Responsive front-end framework for accessible and semantic websites.
Demo, Docs, Repostars753 | #CSS

Specialized

NES.css - NES-style CSS Framework.
Demo, Docsstars17.8k, Repostars17.8k | #SCSS

General Purpose

Spectre.css - Lightweight, responsive and modern CSS framework.
Docs, Repostars10.9k | #SCSS

Toolkits

Bourbon - Lightweight Sass tool set.
Docs, Repostars9.1k, Scaffold | #SCSS

General Purpose

HiQ - Simple CSS foundation with responsive typography and input styling.
Docs, Repostars255 | #PostCSS

Very Lightweight

Chota - Really small CSS framework.
Demo, Docs, Repostars836 | #CSS

Utility-based

Tailwind CSS - Utility-first CSS framework for rapid UI development.
Docs, Repostars48.3k | #CSS

Stalled Development

Cutestrap - Sassy, opinionated CSS framework, a tiny alternative to Bootstrap.
Repostars1.6k

Very Lightweight

Pure - Set of small, responsive CSS modules that you can use in every web project.
Demo, Docs, Repostars22k | #CSS

Picnic CSS - Lightweight and beautiful library.
Demo, Docs, Repostars3.4k | #SCSS

General Purpose

UIkit - Lightweight and modular front-end framework for developing fast and powerful web interfaces.
Demo, Docs, Repostars17.2k | #LESS #SCSS

Material Design

MUI - Lightweight CSS framework that follows Google's Material Design guidelines.
Docs, Repostars4.5k | #SCSS

Stalled Development

unsemantic - Fluid grid for mobile, tablet, and desktop.
Demo, Docs, Repostars1.4k

Centurion - Web-based framework for rapid prototyping and building larger web projects.
Docs, Repostars326

Base / Reset / Normalize

modern-normalize - Normalize for Chrome, Firefox, and Safari only (no support for Edge or Internet Explorer).
Repostars3.8k | #CSS

Base / Reset / Normalize

sanitize.css - The best-practices CSS foundation.
Repostars4.6k | #CSS

Specialized

Tufte CSS - Style your webpage like Edward Tufte’s handouts.
Repostars5k | #CSS

Base / Reset / Normalize

inuitcss - Extensible, scalable, Sass-based, OOCSS framework for large and long-lasting UI projects.
Repostars1.8k | #SCSS

Material Design

Material Components Web - Modular and customizable Material Design UI components for the web.
Demo, Docs, Repostars15.8k | #SCSS

Specialized

Gutenberg - Modern framework to print the web correctly.
Demo, Docsstars4.4k | #SCSS