Modern CSS framework based on Flexbox

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

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

Inactive project – please visit https://themeshaper.com/block-themes/ to learn more about the future of WordPress themes with Block Themes.

List of awesome CSS frameworks in 2025

Easing Functions Cheat Sheet

A specification for building JSON APIs

Mozilla's new typeface, used in Firefox OS

Webpage tracking only using CSS (and no JS)

A web application to build your blog on GitHub

Typeface for setting text in many sizes, weights, and languages. Designed to complement Source Sans.

🍟 The definitive front-end performance guide

Awesome buttons for awesome projects!

A strong, independent CSS Framework. Only 2.7KB minified & gzipped.

SoundCloud for macOS and Windows

100 Days of React UI Interfaces - https://codepen.io/collection/DoLZRm/4/

HTML/CSS markup checklist

🔘 Tiny set of pure CSS animations for your radio inputs. https://720kb.github.io/radiobox.css/

Superclean, powerful, responsive, Sass-based, BEM-syntax CSS grid system

e-book version of Bartosz Milewski's Category Theory for Programmers

Atom One dark syntax theme

Yet another CSS toolkit. Basically the stuff I use for most projects.

Interactive documentation for the Javascript powering WP Media.

An organizer of your npm and bower packages

Hexo implementation of Phantom (http://html5up.net/phantom)

Modular grid powered by Lost and BEM

A dark theme for iTerm, Slack, Terminal, and ZSH based on Atom's One Dark syntax theme.

⚓ Saint Petersburg, Russia