Legend

Legend is a very cool new tabletop RPG based off the Open Gaming License. It is currently in Beta, free, and if you do pay all the proceeds go to Child's Play.

You can learn more about it here: [1] http://www.ruleofcool.com/ A quick explanation is Dungeons and Dragons with the mechanics of 3.5 but the philosophy of 4.0. It is very focused on heroic, powerful player characters and provides a huge amount of opportunity for customization.