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

A modern alternative to CSS resets

Modern CSS framework based on Flexbox

Monospaced font family for user interface and coding environments

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

A collection of loading indicators animated with CSS

Automatically add a progress bar to your site.

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

Tomorrow Theme

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

Functional css for humans

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

Smarter defaults for colors on the web.

Automatically display online/offline indication to your users

A CSS only tooltip library for your lovely websites.

A specification for building JSON APIs

In-depth guide to the best open-source typefaces: https://beautifulwebtype.com

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

Compass is no longer actively maintained. Compass is a Stylesheet Authoring Environment that makes your website design simpler to implement and easier to maintain.

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

Mozilla's new typeface, used in Firefox OS

Design and development standards to align and guide your project.

Markdown source for Michael Abrash's Graphics Programming Black Book

Pure CSS phones and tablets

👜 A beautiful CSS library to kickstart your projects

HTML5 mockups of popular devices, to showcase your portfolio and spice up your website.

An open source icon set with 223 marks in SVG, webfont and raster formats

This could take a while

QuickLook generator for Markdown files.

A web application to build your blog on GitHub