Turning your iPhone into a wireless joypad for playing games on Mac or PC, sound interesting? Here is an app available in AppStore with name of “JoyPad” which lets you to turn your iPhone into a wireless joypad.
Joypad, comes with five different controller layouts, a combo presses functionality, two player supports and easy adjustable settings option. It will connect to your PC or Mac through WiFi or a adhoc connection.
Joypad is available in AppStore for just a 3$. (link)