2014-10-18 Remapping your keyboard in OS X Yosemite

If you want to remap your notebook's or external keyboard, there's an excellent and free choice available: Karabiner from the friendly Takayama Fumihiko.

Upon upgrading OS X yesterday, I found it worked straight away in Yosemite as well.

Besides remapping the obvious keys, if you would like to remap that useless Caps Lock key on OS X, get Seil.