Good Old Tetris - Play Tetris Online. The game that will never get old.

Raspberry Pi - The Raspberry Pi is a tiny and affordable computer that you can use to learn programming through fun, practical projects. Join the global Raspberry Pi community.

Tetris Blitz - Race against the clock in a two-minute blitz to clear lines and rack up points before time runs out.

Arduino - Build your own electronics

NullpoMino - NullpoMino is an open-source action puzzle game that works on the Java platform.

codebender - The Largest Arduino Playground In The World. Create, share and run your code anywhere.