A powerful and stable keyboard customizer for OS X.

PCKeyboardHack applies a patch to a keyboard driver. You can remap CapsLock key, and activate DeadKey on non-Apple keyboard.

DoubleCommand is software for Mac OS X (a kernel extension) that lets you remap keys, in other words change the way your keyboard works. Often used to make a PC keyboard more comfortable with a Mac, swapping the Alt (Option) and Windows (Command or Apple) keys, since they are in swapped positions on Mac and PC keyboards. DoubleCommand is a quick and easy way to fix this if you use a PC keyboard with your Mac.