What are some good online computer games?

I want to play a fun online game on the computer that's like world of war craft or runescape- (any genre i guess) that DOESN'T need to be purchased or downloaded onto your computer. Do you know any fun games like that? by the way i really like anime.What are some good online computer games?
I would suggest crystal saga.What are some good online computer games?
Runescape has a free option.. And btw, there's this site called www.usfine.com that you can buy runescape gold from. They sell it for about 1 dollar per 1m in the game. So you can play for free and be extremely rich on the game lol. But check it out! They're a great websiteWhat are some good online computer games?
Sorry but I am not sure of any game that is like WoW that you can't download.. But! There is a game called Dragon Nest which is a combination of WoW and fps shooting game. Instead of just clicking on a character and spamming spells like wow, you have to actually point all of your skills like a shooting game like Counter strike.. well it is interesting and fun so if you want to try something new.. i think Dragon Nest from Nexon will be an awesome choice! :)