http://www.wesnoth.org/ Idk if you could consider this to be a MMO though, but its free and can be played online with others. You cant create your own character though. Sorry, i dont play/know of many MMOs ^w^''

Trickster online is my favorite 2D fantasy mmorpg owo
and Aika is my favorite 3D mmorpg -w-

I was trying to play Tera Online, look for it ow0 there is a race you can be an anthro xD chubby anthro but still anthro
the bad side of it is that you gotta download 25gb to play it... .w.