With Tilt2Joystick, you can use your entire laptop like a joystick controller.
Requirements: For Mac OS X 10.4 or higher
BrothersoftEditor: Tilt2Joystick is a revolutionary application that allows users to tip and tilt their laptops to play games, draw, scroll, and press any number of configurable keys for use in any application. With Tilt2Joystick, you can use your entire laptop like a Joystick controller. Who says iPhone owners should have all the fun? Tilt2Joystick is lightweight and fast, allowing it to be run seamlessly in the background and used in any application. No special programming skills are needed, you can just start up the application and begin using right away. (Requires Macintosh Laptop with Sudden Motion Sensor.