Arborium
A beautifully rendered world created by Anthony Edwards.
Darwinia
Darwinia is based on one of Sandra Linkletter's Starter Worlds and has 14 rooms. Created by Monika Hübner.
Ecodisk
A well designed with many well crafted and imaginative cobs. created by Darcie
Haven World
Created by Spirit, of The Haunted Creatures
Shack (down) using Slinks Starter Worlds. It is split into thee sections: Night, Day and Tunnel.
Museum of Natural History and Science
A large and strange world with a great many cobs filling it up. Created mainly by Monika Hübner.
Terra Nornia
Probably the most famous 3rd Party world, created jointly by Lis Morris and Sandra Linkletter (Slink) and with many contributors.
Grendel World
Is a version of Albia with in which there are scripts to support breeding Grendels. You will need to download breedable grendels for this to work completely as there is only a sterile male grendel given in the original game.