Transmogrify is a Node.js service that compiles CoffeeScript and compresses Javascript (or both at once). This is intended to be used in environments where you can't install CoffeeScript or a decent javascript minifier for some reason (like Heroku!)
To test:
cake test
To run server:
cake server --port <NUMBER>
http://localhost:3010
gem install transmogrify will get you ruby-coffee-script integration. It will post to http://transmogrify.credibl.es:8080 by default, if you want to point to your own node.js endpoint running transmogrify, specify it like so (this can go in a Rails initializer):
Transmogrify.endpoint = "http://path.to/compile"