Awesome CSS Frameworks

List of awesome CSS frameworks.
Feel free to contribute.

Are you looking for React/Vue/Angular UI Component Libraries instead?

Base / Reset / Normalize
Class-less
Very Lightweight
General Purpose
Material Design
Utility-based
Specialized
Stalled Development

Base / Reset / Normalize

modern-normalize - Normalize browsers' default style.
Repo | #CSS
ress - Modern CSS reset.
Repo | #CSS
Natural Selection - Collection of best-practice CSS selectors.
| #CSS

Class-less

Frameworks that use semantic HTML and do not rely on classes.

Pico.css - Elegant styles for all native HTML elements, dark mode automatically enabled.
Demo, Docs, Repo | #SCSS
MVP.css - Minimalist stylesheet for HTML elements.
Docs, Repo | #CSS
sakura - Minimal classless CSS framework/theme.
Demo, Repo | #SCSS
Simple.css - Lightweight, classless CSS framework.
Demo, Docs, Repo | #CSS
Tacit - CSS framework for dummies, without classes.
Repo | #SCSS

Very Lightweight

Frameworks that are smaller than ~10KB.

Pure - Set of small, responsive CSS modules that you can use in every web project.
Demo, Docs, Repo | #CSS
Picnic CSS - Lightweight and beautiful library.
Demo, Docs, Repo | #SCSS
Chota - Really small CSS framework.
Demo, Docs, Repo | #CSS

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
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

Beer CSS - Build material design interfaces in record time without stress for devs.
Repo | #CSS
Materialize - Responsive front-end library based on Google's Material Design.
Docs, Repo | #SCSS

Utility-based

Tailwind CSS - Utility-first CSS framework for rapid UI development.
Docs, Repo | #CSS
Open Props - CSS custom properties to help accelerate adaptive and consistent design.
Demo, Docs, Repo | #CSS #PostCSS

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
Material Components Web - Modular and customizable Material Design UI components for the web.
Demo, Docs, Repo | #SCSS
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
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
Centurion - Web-based framework for rapid prototyping and building larger web projects.
Docs, Repo