[MrGoodCat]

some more puzzle games:

nintaii - very interesting puzzle game. you have to roll a rectangle column around and get it into a hole. very fun (lite version for free)

phitdroid3 - you are given different shaped blocks and you have to around them into a square/rectangle shape, basically have a smooth perimeter. (free)

titres - free tetris! need i say more (no awesome tetris music though). EA does make a paid version of tetris in all its original glory though

EDIT: i forgot:
not really a puzzle game, but fun anyway (free lite version)

towerbloxx - use drop building on top of each other to build a tower, the higher you get the more people will live there, just don't know you tower down...