Ridiculously cool timewaster...mac only

I debated sharing this one, but if you own later-model macbook laptops, these are just way too slick to not check out. Those that are programming savvy may wish to look at them from a development standpoint as well.

They take advantage of the motion-sensors (accelerometers) built into the macs and ipods/iphones. They let you do semi-useful things like check for level using your computer, and play the old standby pong (youngsters...believe it or not, we use to waste hours playing pong back in the day and while waiting at airports), and many other newer games based on the accelerometer.

pong
bubblegym
bubble level