A TextMate Bundle for the CoffeeScript programming language.
cd ~/Library/Application\ Support/TextMate/Bundles (Textmate 1)
cd /Applications/TextMate.app/Contents/SharedSupport/Bundles (Textmate 2)
git clone git://github.com/jashkenas/coffee-script-tmbundle CoffeeScriptBundle.tmbundle
The bundle includes syntax highlighting, the ability to compile or evaluate CoffeeScript inline, convenient symbol listing for functions, and a number of expando snippets.
Patches for additions are always welcome.
If your TextMate.app is having trouble finding the coffee command, remember that TextMate doesn't inherit your regular PATH.