Modern CSS framework based on Flexbox

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

Minimal CSS Framework for semantic HTML

Automatically add a progress bar to your site.

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

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

Functional css for humans

A modern dialog library which is highly configurable and easy to style. #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Compass is no longer actively maintained.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

A content-first, sliding sidebar theme for Jekyll.

⛷ Dead simple CSS framework.

A classic theme for Ghost

The definitive HTML5 mobile javascript framework

Ghost's default theme (Casper v1.0) on Jekyll

Clank: open source prototyping framework for mobile apps

Sidetap is a simple framework that allows you to quickly build platform-independent mobile web interfaces.

Upgrading to Rails 4 e-book

My minimal Gruvbox CSS file I've been keeping multiple places

A Braintree fake so that you can avoid hitting Braintree servers in tests.

A classless CSS framework

🎨 A semi-flat fork of the Ubuntu Ambiance theme.