Compass (CSS framework)!

CodeKit automatically compiles Less, Sass, Stylus, CoffeeScript, Jade & Haml files. It effortlessly combines, minifies and error-checks Javascript. It supports Compass. It even optimizes jpeg & png images, auto-reloads your browser and lets you use the same files across many projects. And that's just the first paragraph.

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 of plain CSS.

The life-saver app for web developers !Easily check syntax, minify or process all your web assets (stylesheets, scripts and templates) as you edit them with your favorite text editor!