NullpoMino - NullpoMino is an open-source action puzzle game that works on the Java platform.
Good Old Tetris - Play Tetris Online. The game that will never get old.
Blockinger - An open source Tetris clone for Android.
Hextris - An addictive puzzle game inspired by Tetris.
Tetris Online Poland - Tetris Online Poland (TOP) is an online tetris game where you can play tetris with your friends and tetris experts from all over the world.
1010! Klooni - 1010! Klooni is the FLOSS version of the original minimalistic puzzle game by Gram Games.