Rodrigo Rocha has released Joystick Mapper 1.0, his keyboard mapping utility for Mac OS X (10.6 and higher). It costs US$4.99 and is available exclusively through the App Store in the Utilities category.
Compatible with USB or Bluetooth joysticks and gamepads, Joystick Mapper allows anyone to configure their joysticks or gamepads to simulate keyboard keys/mouse movement/mouse click/mouse scroll. Joystick Mapper offers ready-to-use examples and is modifiable. Players can control any app or game using any of these controllers — even the controllers without built-in support.