Foundation

Foundation is an easy to use, powerful, and flexible framework for building rapid prototypes and production code on any kind of device.

Free Open Source Web

Live.js

Say goodbye to Alt-Tab. Live.js makes sure you're always looking at the latest version of the page you're working on, whether you're writing HTML, CSS or Javascript.

Free Open Source Web

Fire.app

Fire.app is a menu bar only app for dead easy HTML prototyping. It supports Sass/Compass, Haml, ERB, Markdown, CoffeeScript, and more. Fire.app is written in Java...

Free Open Source Mac OS X Windows Linux

Compass.app

Compass is a stylesheet authoring framework that makes your stylesheets and markup easier to build and maintain. With compass, you write your stylesheets in Sass instead...

Commercial Mac OS X Windows Linux

Blaze CSS

Open source modular CSS framework providing great structure for building websites quickly.

Free Open Source Mac OS X Windows Linux Self-Hosted

yeti.css

yeti.css is a pattern library consisting of lightweight, reusable modules. It has been built to reflect &yet's visual and branding guidelines.

Free Open Source Mac OS X Windows Linux Self-Hosted

Basis

Clean code development ====================== The Basis classes have prefix. And code style is BEM (MindBemding) and using Stylus. You can use it as CSS framework or...

Free Open Source Self-Hosted