Koala

Koala is a gui for Less, Sass, Compass and CoffeeScript. Koala can run in windows, mac, and linux. Features Multi-language Support: support for Less,Sass, CoffeeScript and Compass Framework.

Free Open Source Mac OS X Windows Linux

CodeKit

CodeKit automatically compiles Less, Sass, Stylus, CoffeeScript, Jade & Haml files. It effortlessly combines, minifies and error-checks Javascript. It supports Compass.

Commercial Mac OS X

Scout-App

Scout-App is a cross-platform desktop app that delivers the power of Sass to the hands of web designers. Scout-app helps make your CSS workflow a snap by delivering more control, optimization, and organization. No developer required.

Free Open Source Mac OS X Windows Linux node-webkit

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

LiveReload

A web developer tool that applies JavaScript and CSS changes without having to reload the page. LiveReload monitors changes in the file system. As soon as you save a file, it is preprocessed as needed, and the browser is refreshed.

Commercial Mac OS X Windows Chrome Firefox

Crunch!

Write your LESS markup. Crunch it into a CSS file. Link the crunched CSS file in your HTML. CRUNCH allows you to organize your LESS/CSS styles into some well-organized...

Freemium Mac OS X Windows Linux

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

SiteFlow

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! Styles processing: Whether you're working...

Commercial Mac OS X

LESS Compiler

LESS Compiler makes formatted CSS styles from less source. Beautify or minify compiled CSS if necessary.

Free Web Crunch!

SASS Compiler

Generate CSS code from sass source using SASS Compiler. Beautify CSS if necessary.

Free Web

Squeezer

Minify, Compile and Compress your Web sources & images. On Mac. With a single click.

Commercial Mac OS X