In The Wild

cortex - MMO game platform written on node.js and WebGL

Docco - a quick-and-dirty literate-programming-style documentation generator for CoffeeScript. Used to produce the annotated source.

eco - Embedded CoffeeScript templates (the erb of CoffeeScript)

zappa - DSL for CoffeeKup, socket.io, express

Zombie.js - headless full-stack testing using node.js