notify-send Coffee-Script tool based on the coffeescript-growl
you must install notify-send which is a command line tool for sending messages to desktop env.
use NPM to install:
npm install -g coffeescript-notify
coffee -r coffeescript-notify --watch --compile ~/sites/my_project/scripts.coffee
This package will work only if you have notify-send
If you are using Mac, you could try the coffeescript-growl