Most popular css repositories and open source projects

Cascading Style Sheets (CSS) is a language used most often to style and improve upon the appearance of views. It allows for the separation of presentation and content, and includes the characteristics of layouts, colors and fonts. CSS builds upon HTML to make webpages more interactive and appealing to the user.

dompdf

HTML to PDF converter for PHP

1752   9763   9763  

GitHub-Dark

:octocat: Dark GitHub style

656   9702   9702  

spark-joy

✨😂 2000+ ways to add design flair, user delight, and whimsy to your...

339   9610   9610  

jupyter-themes

Custom Jupyter Notebook Themes

1073   9596   9596  

content

The content behind MDN Web Docs

22704   9545   9545  

nopCommerce

ASP.NET Core eCommerce software. nopCommerce is a free and open-source...

5434   9475   9475  

win11React

Windows 11 in React 💻🌈⚡

1077   9419   9419  

uncss

Remove unused styles from CSS

438   9341   9341  

material-design-for-bootstrap

Important! A new UI Kit version for Bootstrap 5 is available. Access t...

1133   9305   9305  

bourbon

A Lightweight Sass Tool Set

904   9106   9106  

reference

⭕ Share quick reference cheat sheet for developers.

1121   8931   8931  

transform

A polyglot web converter.

648   8797   8797  

flowbite

Open-source UI component library and front-end development framework b...

816   8715   8715  

awesome-css-frameworks

List of awesome CSS frameworks in 2025

476   8658   8658  

magic

CSS3 Animations with special effects

1179   8549   8549  

water.css

A drop-in collection of CSS styles to make simple websites just a litt...

493   8386   8386  

hint.css

A CSS only tooltip library for your lovely websites.

715   8344   8344  

js-beautify

Beautifier for javascript

1388   8174   8174  

csslayout

A collection of popular layouts and patterns made with CSS. Now it has...

523   8099   8099  

carbon

A design system built by IBM

1870   8075   8075  

98.css

A design system for building faithful recreations of old UIs

271   8068   8068  

tailblocks

Ready-to-use Tailwind CSS blocks.

756   8056   8056  

neutralinojs

Portable and lightweight cross-platform desktop application developmen...

413   8013   8013  

Blog

关注基础知识，打造优质前端博客，公众号[前端工匠]的作者

1192   7949   7949  

rebass

:atom_symbol: React primitive UI components built with styled-system.

650   7933   7933  

blog

Too young, too simple. Sometimes, naive & stupid 🐌

837   7876   7876  

styled-system

⬢ Style props for rapid UI development

496   7873   7873  

stitches

[Not Actively Maintained] CSS-in-JS with near-zero runtime, SSR, multi...

256   7767   7767  

styled-jsx

Full CSS support for JSX without compromises

262   7751   7751  

purgecss

Remove unused CSS

259   7434   7434  

web-skills

A visual overview of useful skills to learn as a web developer

708   7375   7375  

css-selector

Converts CSS selectors to XPath expressions

43   7278   7278  

lightningcss

An extremely fast CSS parser, transformer, bundler, and minifier writt...

219   7161   7161  

FE-Interview

🔥🔥🔥 前端面试，独有前端面试题详解，前端面试刷题必备，1000+前端面试真...

892   7103   7103  

hamburgers

Tasty CSS-animated Hamburgers

1621   7096   7096  

metroui

A progressive front-end framework for creating high-performance respon...

1959   7058   7058  

timesheet.js

JavaScript library for HTML5 & CSS3 time sheets

547   6985   6985  

jss

JSS is an authoring tool for CSS which uses JavaScript as a host langu...

428   6974   6974  

magic-of-css

A CSS course to turn you into a magician.

413   6676   6676  

charts.css

Open source CSS framework for data visualization.

181   6536   6536  

emmet-vim

emmet for vim: http://emmet.io/

410   6459   6459  

clarity

Clarity is a scalable, accessible, customizable, open source design sy...

752   6419   6419  

BOOTSTRA.386

A vintage 1980s DOS inspired Twitter Bootstrap theme

305   6415   6415  

windicss

Next generation utility-first CSS framework.

174   6378   6378  

css-blocks

High performance, maintainable stylesheets.

159   6347   6347  

flexboxfroggy

A game for learning CSS flexbox 🐸

615   6292   6292  

WebSlides

Create HTML presentations in seconds —

589   6267   6267  

react-nodegui

Build performant, native and cross-platform desktop applications with...

173   6201   6201  

cssfx

✨ Beautifully simple click-to-copy CSS effects

356   6153   6153  

eui

Elastic UI Framework 🙌

843   6121   6121