Awesome CSS Frameworks 
List of awesome CSS frameworks.
Feel free to contribute.
Supported by FrontAid CMS:

Contents
Base / Reset / Normalize
Class-less
Frameworks that use semantic HTML and do not rely on classes.
Very Lightweight
Frameworks that are smaller than ~5KB.
General Purpose
-
Bootstrap - The most popular HTML, CSS, and JavaScript framework for developing responsive, mobile first projects on the web.
Demo,
Docs,
Repo
| #SCSS
-
Bulma - Modern CSS framework based on Flexbox.
Demo,
Docs,
Repo
| #Sass
-
Foundation - The most advanced responsive front-end framework in the world.
Demo,
Docs,
Repo
| #SCSS
-
UIkit - Lightweight and modular front-end framework for developing fast and powerful web interfaces.
Demo,
Docs,
Repo
| #LESS #SCSS
-
Primer - CSS framework that powers GitHub's front-end design.
Docs,
Repo
| #SCSS
-
Pico.css - Elegant styles for all native HTML elements, dark mode automatically enabled.
Demo,
Docs,
Repo
| #SCSS
-
Carbon Components - Component library behind IBM's Carbon Design System.
Docs,
Repo
| #SCSS
-
U.S. Web Design System - Components used by U.S. federal government websites.
Docs,
Repo
| #SCSS
-
Fomantic-UI - Build beautiful websites fast, with concise HTML, intuitive javascript, and simplified debugging.
Docs,
Repo
| #LESS
-
Blaze UI - Open source modular toolkit providing great structure for building websites quickly with a scalable and maintainable foundation.
Demo,
Docs,
Repo
| #SCSS
-
Cirrus - Component and utility centric SCSS framework designed for rapid prototyping.
Demo,
Docs,
Repo
| #CSS
-
Vanilla Framework - Simple, extensible CSS framework. Written by the Canonical Web Team.
Demo,
Docs,
Repo
| #SCSS
-
PatternFly - UI framework for enterprise web applications.
Demo,
Docs,
Repo
| #SCSS #LESS
-
Stacks - UI components used by Stack Overflow.
Docs,
Repo
| #LESS
-
HiQ - Simple CSS foundation with responsive typography and input styling.
Docs,
Repo
| #PostCSS
Material Design
Utility-based
Specialized
-
NES.css - NES-style CSS Framework.
Demo,
Docs,
Repo
| #SCSS
-
98.css - CSS library for building interfaces that look like Windows 98.
Repo
| #CSS
-
Tufte CSS - Style your webpage like Edward Tufte’s handouts.
Repo
| #CSS
-
Gutenberg - Modern framework to print the web correctly.
Demo,
Docs
| #SCSS
-
System.css - Design system for building retro Apple interfaces.
Repo
| #PostCSS
-
XP.css - CSS library for building interfaces that look like Windows XP.
Repo
| #PostCSS
-
TuiCss - Library to create MS-DOS interfaces.
Demo,
Docs
| #SCSS
-
7.css - CSS library for building interfaces that look like Windows 7.
Repo
| #PostCSS
-
Bojler - Email framework for developing responsive and lightweight email templates.
Docs,
Repo
| #SCSS
-
Orbit - CSS framework designed for building any kind of radial UI.
Docs,
Repo
| #SCSS
Stalled Development
Frameworks that have not seen any real development for more than about one year or officially have been deprecated.
We are keeping them here for reference/inspiration and hope for a revival.
Show Section
-
Semantic UI - User interface is the language of the web.
Docs,
Repo
| #LESS
-
Tachyons - Quickly build and design new UI without writing CSS.
Demo,
Docs,
Repo
| #CSS
-
Bourbon - Lightweight Sass tool set.
Docs,
Repo
| #SCSS
-
Water.css - Just-add-CSS collection of styles to make simple websites just a little nicer.
Repo
| #CSS
-
sanitize.css - The best-practices CSS foundation.
Repo
| #CSS
-
modern-css-reset - Tiny little reset that you can use as the basis of your CSS projects.
Repo
| #CSS
-
minireset.css - Tiny modern CSS reset.
Repo
| #Sass
-
CSS Remedy - Start your project with a remedy for the technical debt of CSS.
| #CSS
-
inuitcss - Extensible, scalable, Sass-based, OOCSS framework for large and long-lasting UI projects.
Repo
| #SCSS
-
unsemantic - Fluid grid for mobile, tablet, and desktop.
Demo,
Docs,
Repo
-
Propeller - Front-end responsive framework based on Google's Material Design standards & Bootstrap.
Docs,
Repo
| #SCSS
-
Concise CSS - Give up the bloat. Stop tripping over your classes. Be concise.
Docs,
Repo
| #SCSS
-
Responsive Boilerplate - Powerful, accessible, developer friendly framework for building responsive websites.
Docs,
Repo
| #SCSS
-
turretcss - Responsive front-end framework for accessible and semantic websites.
Demo,
Docs,
Repo
| #CSS
-
Centurion - Web-based framework for rapid prototyping and building larger web projects.
Docs,
Repo
License
License CC0 1.0:
You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.
Images of GitHub stars are provided by Shields.