Metanet

Metanet Software was founded in 2001 by Raigan Burns and Mare Sheppard. Metanet is a indie game development company devoted to creating fun, innovative, unique games. Their first and award-winning game, N, is available for download for free, and can be played on Mac or PC. Their next game, Robotology, is in development. They've released tutorials, including source code, which cover the collision detection and simulation algorithms used in N.