OpenFeint is a 3rd party library that enables social gaming features such as public leaderboards and achievements. For more information, see http://www.openfeint.com/ and http://www.openfeint.com/developers.
Starting with daily build #318, iOS OpenFeint will post achievement updates and leaderboard updates to GameCenter provided OFGameCenter.plist is present in the project folder. See http://support.openfeint.com/dev/game-center-compatibility/ for details.
For more information see the OpenFeint guide.
open feint api is deprecated.
use: http://developer.anscamobile.com/reference/index/game-network