The Dink Network

Are there other similar RPGS like Dink?

Not realy. The next step up is games like Bladurs Gate or Diablo. And those are hard to mod. Eternal Lands Should get good if you like 3d.
There's something about Dink though.... I guess its modability and community.

I know another free rpg, called Ahriman's Prophecy. I really enjoyed it.