Pong Quest - A classic pong quest through unique levels full of twists! Plus 2 player mode!
Google Open Source - All of Googles open source projects under a single umbrella
Switch Up - An addictive, retro-style pong game.
LaunchKit - Open Source - A popular suite of developer tools, now 100% open source.
WimblePong Tennis - WimblePong combines the addictiveness of Arcade hit Pong with the rules of tennis.
Open Source @IFTTT - A collection of IFTTT OSS projects.