Practice Your Code-Fu: Programming Contests and Puzzles Online | GrokCode
http://grok-code.com/214/practice-your-code-fu-programming-contests-and-puzzles-online/
10 Creative Contests Powered by Social Media
http://mashable.com/2009/08/11/social-media-contests/
12 Photo Contests to Enter Right Now: Win Fame, Glory and an Army of Minions!
http://photojojo.com/content/guides/photography-contests-2008-2009/

list na photojojo