The most popular HTML, CSS, and JavaScript framework for developing responsive, mobile first projects on the web.

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

The 960 Grid System is an effort to streamline web development workflow.

A modern alternative to CSS resets

Premium hand-crafted icons built by Ionic, for Ionic apps and web apps everywhere 🌎

Flat UI Free - Design Framework (html/css3/less/js). Flat UI is based on Bootstrap, a comfortable, responsive, and functional framework that simplifies the development of websites.

A professional front-end template for building fast, robust, and adaptable web apps or sites.

The most advanced responsive front-end framework in the world. Quickly create prototypes and production code for sites that work on any kind of device.

Modernizr is a JavaScript library that detects HTML5 and CSS3 features in the user’s browser.

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

A collection of CSS3 powered hover effects to be applied to links, buttons, logos, SVG, featured images and so on. Easily apply to your own elements, modify or just use for inspiration. Available i…

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

Low-level CSS Toolkit – the original Functional/Utility/Atomic CSS library

All the patterns

Smarter defaults for colors on the web.

Official open source SVG icon library for Bootstrap.

A set of free MIT-licensed high-quality SVG icons for UI development.

🎏 A curated collection of all country flags in SVG — plus the CSS for easier integration

A set of over 5500 free MIT-licensed high-quality SVG icons for you to use in your web projects.

🌼 🌼 🌼 🌼 🌼  The most popular, free and open-source Tailwind CSS component library