Lilt - wave your notebook like you just... want to turn up iTunes
If you're finished with smacking your MacBook to make it do your bidding, maybe you can move on to tilting it and playing with the some mood lighting (in the Pro models) to really get things done? Lilt is a new app that harnesses the power of of Apple's Sudden Motion Sensor (found in PowerBooks, MBs and MBPs) and the ambient light sensor (PowerBooks and MBPs only) to allow you to trigger the launch of applications, files and scripts. With AppleScript support, the possibilities are of course almost limitless, but the basic examples the developer Jonathan Nathan uses include waving your hand over the ambient light sensor to change tracks in iTunes, as well as tilting the machine back to hear the time spoken to you. Naturally, Lilt includes plenty of built-in actions like locking the screen, speaking text, controlling the volume and launching apps, just to help you hit the ground running.
Until November 30th, Lilt is offered as a pre-release version, free of restrictions. After that, the price rises to a mere $5. Not bad for a whole new way to boss your notebook around, and with Lilt, the odds are far less that you might give it a black eye.