Fill your MAC with liquid – Download LiquidMAC
Mimics the behavior of liquid by creating a particle system that reacts to the computer’s orientation. LiquidMac requires a macintosh laptop computer with a sudden motion enabled sensor. This includes MacBook family, MacBook Pro family, and some of the latest PowerBooks.
Launch it and tilt gently your computer see the effect. Change the color of the liquid and enjoy. Play with the different parameters to get the desired effect. It can also go to full screen.
Download it from here: