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

Prepros

Compile Less, Sass, Scss, Stylus, Jade, Coffeescript, Haml and Markdown with live browser refresh.

Free Personal 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

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

Hammer

Hammer is a great way of building out HTML websites. With features including HTML includes, SASS and Coffeescript parsing and Clever Paths, Hammer is an indispensable...

Commercial Mac OS X

stylelint

A mighty, modern CSS linter that helps you enforce consistent conventions and avoid errors in your stylesheets. Features: Over one hundred and fifty rules:...

Free Open Source Web Self-Hosted

Smaller

Smaller is a powerful HTML, PHP, CSS and JavaScript compressor on Mac OS X, definitely a must have for every Mac based web developers.

Commercial Mac OS X

Compass (CSS framework)

Compass is an open-source SASS library - extending capabilities of SASS and provides cross-browser mixins for CSS properties introduced in CSS3. The terminal...

Free Open Source Web

Cactus for Mac

A better workflow for hand coding websites

Commercial Mac OS X

Delivery

A little, yet powerful code compressor. Delivery make your scripts and stylesheets lighter. So them load faster. Three different engines. By the JS side, Delivery...

Free Mac OS X

LivePage

LivePage reloads website resources such as CSS, HTML and JavaScript as they update on the server.

Commercial

Squeezer

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

Commercial Mac OS X

Minimus

Minimus is a GUI frontend for Yahoo’s YUI Compressor. Instead of using inconvenient and slow websites to compress your JavaScript and CSS, you can do it right on your...

Free Mac OS X

Javascript Packer

Javascript Packer allows you to quickly validate and compress javascript code. Developers will find that compressing a single or multiple javascript files can take...

Commercial