Electronic Arts and Bioware have released a new free-to-play Facebook game Dragon Age: Legends, in which you can create a character and send them off on battles, using Facebook friends as party members during battles. Players can then build their own castle and have servants perform tasks like creating potions.
Even better, playing the game unlocks free items for use in Dragon Age II; all you have to do is link your account to the game.
The game itself is pretty fun, and not too demanding. Players can check it out at the official Facebook site.