If you’re a developer that always needs access to unicode values and modifier keys state or you simply want to quickly paste keys like ⌘ and ⌥ to your clipboard because you don’t know the proper keyboard shortcut, Key Codes may come in handy. A free download in the Mac App Store and developed by Many Tricks (the same guys behind Witch, Name Mangler and Desktop Curtain), Key Codes displays key code, unicode value “and modifier keys state for any key combination you press.”
A little utility for sure, but useful. Get it here.