Blockinger - An open source Tetris clone for Android.
NullpoMino - NullpoMino is an open-source action puzzle game that works on the Java platform.
Tetris Blitz - Race against the clock in a two-minute blitz to clear lines and rack up points before time runs out.
Hextris - An addictive puzzle game inspired by Tetris.
1010! Klooni - 1010! Klooni is the FLOSS version of the original minimalistic puzzle game by Gram Games.
Block Tile Puzzle - Block Tile Puzzle is a super-addictive game which is easy to learn but tough to master.