🍿 A cross-browser library of CSS animations. As easy to use as an easy thing.

Iconic font aggregator, collection, & patcher. 3,600+ icons, 50+ patched fonts: Hack, Source Code Pro, more. Glyph collections: Font Awesome, Material Design Icons, Octicons, & more

A modern alternative to CSS resets

不止于 CSS

Skeleton: A Dead Simple, Responsive Boilerplate for Mobile-Friendly Development

Build mobile apps with simple HTML, CSS, and JavaScript components.

Minimal CSS Framework for semantic HTML

A showcase of problems once hard or impossible to solve with CSS alone, now made trivially easy with Flexbox.

Functional css for humans

Spectre.css - A Lightweight, Responsive and Modern CSS Framework

This repo is archived. Thanks!

The fastest way to build beautiful Electron apps using simple HTML and CSS

A design system for building faithful recreations of old UIs

A spinning activity indicator

Automatically display online/offline indication to your users

A CSS only tooltip library for your lovely websites.

List of awesome CSS frameworks in 2025

Easing Functions Cheat Sheet

HTML/CSS drawing in the style of an 18th-century oil painting. Hand-coded entirely in HTML & CSS.

A specification for building JSON APIs

Smoothly transitions numbers with ease. #hubspot-open-source

A collection of loading spinners animated with CSS

A modern dialog library which is highly configurable and easy to style. #hubspot-open-source

Create beautiful CSS3 powered animations in no time.

💄CSS tricks for web developers~

A best-practices CSS foundation

Synthwave inspired colour theme for VS Code 🌅🕶

A modular minifier, built on top of the PostCSS ecosystem.

Pure CSS phones and tablets

Powerful, scalable, Sass-based, BEM, OOCSS framework.