Oh man there’s quite a few. The big one right now is Mythras. Like, I’m writing an Elder Scrolls sourcebook for it and I’ve never had a chance to actually play the game.

Others include:

• Og (the caveman RPG, the narrative version)
• Paranoia (Friend Computer knows what’s best for you, your fellow players certainly don’t)
• Houses of the Blooded (Everyone is a passionate Lord or Lady trying to be as swag as possible, + domain management)
• GURPS Book of the New Sun (Just look up BotNS if you don’t know)
• Red Markets (A zombie apocalypse RPG that bills itself as “economic horror”)