Late last year, the developer who created popular indie game Canabalt released the game's source code under an MIT open source license. This license lets other developers use the underlying game engine to power their own games for either private or commercial distribution. While the underlying engine is free to use, the Canabalt developer clearly states other developers cannot "distribute or redistribute our game code, art or sounds."
Unfortunately, PLD Soft appears to have violated this open source license by taking the source code, repackaging it with minimal changes and submitting it to the App Store as an app called