Sporty - Beautiful app for creating/joining sports activities nearby
Good Old Tetris - Play Tetris Online. The game that will never get old.
5F - Find Fit Friends - Tinder for more “active” people. Find Sport Buddies.
Blockinger - An open source Tetris clone for Android.
Fullcourt - The social network for basketball players
NullpoMino - NullpoMino is an open-source action puzzle game that works on the Java platform.