Page: http://www.ddo.com/
I started playing this after it went free, and it's actually not that bad. It's more or less Dungeons and Dragons, except played online in an MMO setting (hence the name). The only issue I've had so far is that the dice roller is incredibly bad, with rolls between 1-3 showing up about 40% of the time.
The game itself is huge though, so I'd give some thought before spending multiple hours downloading it.