LiquidPhone for the iPhone / iPod mimics the behavior of liquid by creating a particle system that reacts to the devices orientation. A custom built 2D physics engine makes the liquid behave realistically.
The settings screen allows to achieve different liquid behaviors by changing parameters like the gravity, the liquids rigidness, or the simulation speed.
LiquidPhone for iPhone is a port of the "LiquidMac" application, originally built for Apple laptops.