Here's a list of MMORPGs. I'll be adding up more soon. Let me know the ones I'm missing.
2Moons [Closed Beta]
http://2moons.acclaim.com/
9 Dragons [Open Beta]
http://9dragons.acclaim.com/
BOTS [Free To Play]
http://bots.acclaim.com/
Cabal Online [Free To Play]
http://www.cabalonline.com/
Corum [Free To Play]
http://corum.gpotato.com/
FlyFF [Free To Play]
http://flyff.gpotato.com/
GodBorn [Under Development]
http://www.godborn.com/
Granado Espada [Closed Beta]
http://www.granadoespada.sg/en/
Guild Wars [One Time Payment, Then It's Free To Play]
http://www.guildwars.com/
GunBound [Free To Play]
http://www.gunbound.com/
GunZ [Free To Play]
http://www.gunzonline.com/
Last Chaos [Open Beta]
http://lastchaos.aeriagames.com/
Lunia [Free To Play]
http://global.lunia.com/
Maple Story [Free To Play]
http://www.maplestory.com/
Monster Trainer [Free To Play]
http://www.monstertraineronline.com/
Mu Online [Free To Play]
http://www.globalmuonline.com/
Myth Wars [Free To Play]
http://www.mythwaronline.com/
OutWar [Free To Play]
http://www.outwar.com/
Ragnarok Online [Pay To Play]
http://www.ragnarokonline.com/
Rakion [Free To Play]
http://rakion.softnyx.net/
Rappelz [Free To Play]
http://rappelz.gpotato.com/
Rose Online [Pay To Play]
http://www.roseonlinegame.com/
Runescape [Free To Play]
http://www.runescape.com/
Silkroad [Free To Play]
http://www.silkroadonline.net/
Space Cowboy Online [Free To Play]
http://sco.gpotato.com/
Tibia [Free To Play]
http://www.tibia.com
Warrock [Free To Play]
http://www.warrock.net/
World of Warcraft [Pay To Play]
http://www.worldofwarcraft.com
Let me know if you want me to add any other games.