Looking at f2p games that apparently died while I wasn't looking:
Dethroned!
Dragomon Hunter
Dungeonland
Firefall (good riddance!)
Hawken
Marvel Heroes
Might & Magic: Duel of Champions
Rise of Incarnates
Super Monday Night Combat
TOME: Immortal Arena
Warside
and soon, WildStar
Props to those games that aren't blockbusters but manage to keep the lights on!