Goblin Camp
People rave about Dwarf Fortress, and it all sounds well and good, but I just don't have the time to learn to decipher the arcane interface that immersion into it is given through. However, a new open source project called Goblin Camp has started up that aims to make a similar game.
Given that something like this is a world simulation of sorts, I wonder whether harnessing it to run a MUD world within, is possible or worthwhile.
Screenshot taken from this forum thread.