Ordinary Puzzles - A minimalistic puzzle game inspired by Picross and Sudoku.
Blockinger - An open source Tetris clone for Android.
Linjat - A puzzle game which began as an experiment with procedural puzzle generation.
NullpoMino - NullpoMino is an open-source action puzzle game that works on the Java platform.
Nonogram.com - Classic picture cross puzzle game for mobile.
Good Old Tetris - Play Tetris Online. The game that will never get old.