Gears is a library to compile, concatenate and minify JavaScript and CSS assets, highly inspired by Ruby’s Sprockets. You can also write scripts, styles and client templates using CoffeeScript, Handlebars, Stylus, Less, and compile them using external packages (gears-coffeescript, gears-handlebars, gears-stylus, gears-less). These packages already include all required node.js modules, so you don’t need to worry about installing them yourself.
There is also:
Gears code is hosted on GitHub: https://github.com/gears/gears.