cd ~/Library/Application\ Support/Sublime\ Text\ 2/Packages
git clone git://github.com/jashkenas/coffee-script-tmbundle CoffeeScript
git clone https://github.com/miksago/jade-tmbundle.git Jade
git clone https://github.com/LearnBoost/stylus.git Stylus
If it hasn't worked, try closing and reopening any saved tabs.
Excellent, works great for Sublime Text 3 on Windows 8.1! Just downloaded the Jade ZIP from GitHub and unzipped it in the packages folder (Preferences > Browse packages). Restarted Sublime and voila!