Google Open Source - All of Googles open source projects under a single umbrella
Pong Quest - A classic pong quest through unique levels full of twists! Plus 2 player mode!
LaunchKit - Open Source - A popular suite of developer tools, now 100% open source.
Classic Pong G - Classic Pong G is an awesome mix of classic pong with new features, this version of ping pong includes 9 levels and a endless level creating an unique experience.
Open Source @IFTTT - A collection of IFTTT OSS projects.
Cube Slam - Beautiful, browser-based game of Pong in 3D.