There's a
something called Wurm.
www.wurmonline.com
Not quite sure where you'd put it, I guess MMO. It's Java based, I believe, and in many ways similar to but superior to Runescape. One noteworthy thing is that it's fairly realistic, trees and minerals and such don't just magically respawn. Also, not all items/raw materials are created equal in this thing. Pretty much all items have a quality stat.