Toggl - Toggl is an online time tracking tool. It features 1-click time tracking and helps you see where your time goes. Free and paid versions are available.
NullpoMino - NullpoMino is an open-source action puzzle game that works on the Java platform.
Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.
Blockinger - An open source Tetris clone for Android.
RescueTime - Time management software that shows you how you spend your time & provides tools to help you be more productive.
Good Old Tetris - Play Tetris Online. The game that will never get old.