NapBot - NapBot is Machine Learning powered sleep tracker for your Apple Watch.
NullpoMino - NullpoMino is an open-source action puzzle game that works on the Java platform.
Rise: Track Sleep & Circadian - Wake up & fall asleep better
Blockinger - An open source Tetris clone for Android.
Withings Sleep - A sleep tracking mat by Withings
Good Old Tetris - Play Tetris Online. The game that will never get old.