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Dood : The Puzzle Planet - A strategy puzzle game for the smart ones
NullpoMino - NullpoMino is an open-source action puzzle game that works on the Java platform.
Two Dots - Sharpen your puzzle solving skills with a challenging game of dot connection.
Blockinger - An open source Tetris clone for Android.
63 - 63 is a race against the world.
Good Old Tetris - Play Tetris Online. The game that will never get old.