Mutants & Masterminds

Mutants & Masterminds is a game published by Green Ronin and written by Steve Kenson. It is based on a (heavily modified) d20 engine and is currently in its second edition.

Links:

Official Site

http://www.mutantsandmasterminds.com/

Wikipedia

http://en.wikipedia.org/wiki/Mutants_and_Masterminds

RPG.net Game Index

http://index.rpg.net/display-entry.phtml?mainid=145