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.
Ordinary Puzzles - A minimalistic puzzle game inspired by Picross and Sudoku.
Tetris Blitz - Race against the clock in a two-minute blitz to clear lines and rack up points before time runs out.
PH Builds a Puzzle - A realtime, collaborative jigsaw puzzle.