HTML & CSS Libraries

A Virtual CSS language with enhanced syntax. Efficiently build your UI and design system with HTML only.

Marko is a friendly (and fast!) UI library that makes building web apps fun. It's like HTML and JS had a perfect baby that grew up to be awesome

A design system for building faithful recreations of old UIs.

CSS library for building interfaces that resemble Apple's System OS which ran from 1984-1991.

Shoelace provides a collection of professionally designed, every day UI components built on a framework-agnostic technology.

Materialize is a modern responsive CSS framework based on Material Design by Google.

Bourbon is a library of pure Sass mixins and functions that are designed to make you a more efficient style sheet author.

A design element gallery for web designers and web developers. Find snippets using HTML, CSS, Javascript, jQuery, and Bootstrap.

Free themes for Bootstrap.