The MacBook has motion sensors in which we probably all know. Lilt is a new program which allows you to configure your MacBook to respond to the motions. For example you could tilt it 30 degrees left and iTunes would load up. Several other options are Growl Notifications, Screen Lock, Say Text, Volume control and Switch applications.
The software costs $5 for the shareware and is available from here.
Via: SlashGear