The real Ragnarok Online isn't free. Only private servers are free. Also, some of those games look really cool. Thanks for posting.
Theres an US version of Rag2 beta. Although its buggy at times it free and worth trying. http://www.euphro2.com/forum/index.php?act=index
Not to be advertising for RO2 but i've played it for bout a month now and its still entertaining. Although i like games that involve mindless grinding, takes my mind off other stuff.
Yup, Rappelz is pretty good. http://rappelz.gpotato.com/ Same company for FlyFF. I use to play Silkroad as well. Got up to the 7th degree of weapons and armor then quit. Couldn't stand the constant crowd of servers and bots...
rappelz, last chaos, archlord, rf online, 9 dragons, 2 Moons, second life =P... first 6 is mmorpg.. last one is like The Sims... I don't play any of these anymore.. but just some titles that I've played that are free..
I heard League of Legions is free. It's getting lots and lots of attention lately and soon to become one of the "e-sports" like SC2. Think it's being added to MLG Raleigh, which is gonna be pretty neat.