The Cosmology RPG Engine powers the Invulnerable Tabletop Super Hero Roleplaying Game, and the Dirge Dark Modern Fantasy Roleplaying Game.
The Cosmology RPG Engine uses 3d6 + Attribute + Talent vs. a Difficulty Number for task resolution. Character creation is designed to be quick and smooth, but combat is gritty and intense. The point isn't crunching numbers or hacking and slashing, though; the Cosmology system is about interesting characters and great stories.