Osmos by Hemisphere Games
From the minds of Canadian developers Hemisphere Games comes a physics based, highly intuitive and minimalistic indie game Osmos. The zen-like state that one enters when playing Osmos is very similar to flOw. The objective of the game is to absorb smaller motes while avoiding larger ones, which are trying to absorb you. To move around in the low gravity world, you must propel yourself by sacrificing some of your size.
Osmos was a finalist for the Seumas McNally Grand Prize, Excellence in Design and Technical Excellence at the Independent Games Festival. Osmos is a great indie iPhone game, which has since been ported to PC, Mac and Linux, and is definitely a game worth checking out.