TERA, Star Wars The Old Republic, Lord of the Rings Online are the three big ones I know of and have played.
I know there are tons more but I can't speak to them.
Of the above 3, TERA has the best F2P model (IMO). I can't stand LotRO model personally, but there are those who like it. SW:ToR has a pretty terrible model, not many people will refute that, but the hinderances can be overcome with in-game currency. If you want to try SWToR I'd recommend subbing for a month, especially now that they are having a 12x xp thing going on for class story missions.