Ever had your computer wake up for no reason? Do you have a media centre mac that you can't monitor all the time?
Sleeper Agent is a handy little menu bar application which will activate when your mac comes out of sleep. You will then have a time limit, which can be set in preferences, to move the mouse, press a key, or use your Apple Remote, before it puts your computer back to sleep again.
Perfect for misbehaving computers, media centre macs, and any computer you want to save power with!