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 (JRuby), and works in Mac, Linux and PC.
Tired of having to compile your scripts manually? Do you want to optimize your website images? Do you really want to speed up your website by shaving off unnecessary file bulk? Just drag'n'drop your files and Squeezer will take care of the rest!