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. Called DoubleCommand because originally it was used to give the old PowerBooks a second Command key, where there was an enter key.

Features:

• Enter key acts as a Command key
• Enter key acts as a Control key
• Enter key acts as an Option key
• Enter key acts as an fn key (partial support, cursor keys only)
• Command key acts as an Option key
• Command key acts as a Control key
• Option key acts as a Command key
• Control key acts as a Command key
• Swaps Control key and Option key
• Capslock key acts as a Control key
• fn key acts as a Control key
• Swaps numpad . with numpad shift+.
• Shift + Delete acts as a Forward Delete
• Disable Command and Option
• PC style Home and End keys
• Backslash (\) acts as a Forward Delete
• Swap function key behaviour on new 'Books
• Disable Capslock
• Enter key acts as Forward Delete
• Caps lock acts as delete

Requirements:
OS X 10.6+
Intel