FingerSmoke is a fun little interactive fluid thermodynamics simulation for Android by Aniviza. It starts out with little wisps of smoke that stream out wherever you touch the screen, and eventually it builds up to be a billowing smoke and fire filled chamber of hand-held inferno. BWAHAHAHAHAHAHA! You can add more fuel by tapping or swiping, and create air currents by pinching with two fingers. Menu options include a smoke color picker, a brightness setting, and the trippy button which splits the dynamic range into opposing purple and green gases that compete with and consume each other. It's all in a transparent overlay above your home screen or whatever launched it, as a screen guard.

 It is surprisingly realistic, always shifting and changing much like a real fire. If you liked lava lamps back in the hippie days, or like fully cool stuff in general, you're going to have a burning pile of fun with FingerSmoke. In the Android Market now!