hmmm... people are saying ones that probably wont last you long. Lineage 2 is what you want. It is like another version of WoW, but 100s of free servers on sites like l2Hopzone.
personaly I suggest getting one in the Kamael client(its the newest, and has a new race). But it is confusing at first with all the items graded and stuff. Go
here and read most of the stuff to understand the game. But this isnt for Kamael so you might be better off with a server on an older version.