Homebrew Campaign Settings

These are various homebrew campaign settings that can be found on the web.

Urbis - A World of Cities
Dark Heritage - Pirates, curses, swinging from the rigging of one ship to board another, wild, crazy, swashbuckling swordfights, etc. Crazy, unearthly plants, animals and even humans, the ships described above are actually flying through the air, and the terrain is harsh and alien. The hero is larger than life and quite capable, but the setting itself is grim, dark and infused with a blasphemous fear of sorcery, nameless cults and horrible demons.
Tempest - A WIKI vanilla d20 fantasy setting, to which you may contribute
Heptovania - A really big vanilla fantasy RPG setting: 1500+ articles!
Farland - Another rich d20 setting with a nice website
The Hyborian Age - Conan's world for d20 RPGs
Amethyst - An original mix of fantasy and sci-fi using D&D3e + D20 Modern
Eyru - A d20 world of fantasy inspired by the Iron Age Celtic cultures
World of Khoras - An extensive fantasy campaign setting for any RPG system
World of Highland - An alternate Earth fantasy setting, with its own RPG system
Terra-Viejo - Another alternate Earth fantasy setting, but for d20
Dage - An old Earth-like Dark Ages fantasy world, for AD&D
Palaestra - A d20 fantasy setting of "Byzance against Faery"
Agyris - Very nice and original website for this Fudge setting
Korinth & Elindra - Two succinct d20 worlds, but with beautiful websites
The Oriental Hardpoint - An Asian/Oriental campaign setting