http://www.steampowered.com/steamworks/index.php
Repost? w/e DOET!
"On January 28, 2008, Valve released Steamworks, a freely available development and publishing suite which will allow developers to use parts of Steam. In particular, Steamworks allows for auto-updating, game statistics, multiplayer capabilities with voice chat, and access to the Steam community. Developers have access to quick build distribution, crash testing, and usability data. Audiosurf, the first game to use the suite, was released on February 11, 2008"
http://en.wikipedia.org/wiki/Steam_%...%29#Steamworks