Dood : The Puzzle Planet - A strategy puzzle game for the smart ones
Blockinger - An open source Tetris clone for Android.
PH Builds a Puzzle - A realtime, collaborative jigsaw puzzle.
NullpoMino - NullpoMino is an open-source action puzzle game that works on the Java platform.
Atomas - Simple rules, endless fun!
Tetris Blitz - Race against the clock in a two-minute blitz to clear lines and rack up points before time runs out.