Homebrew Campaign Settings

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

Aecyr Grene - A fantasy campaign setting for HARP.
Agyris - Very well done and original website for this Fudge setting.
Amethyst - An original mix of fantasy and sci-fi using D&D3e + D20 Modern.
Aquerra - A low-to-moderate magic campaign setting for D&D3e
Dage - An old Earth-like Dark Ages fantasy world, for AD&D.
Dark Heritage - Swashbuckling in a grim setting infused with blasphemous cults and horrible demons. D20 + houserules.
Eyru - A world of fantasy inspired by the Iron Age Celtic cultures, for d20.
Fargoth - The Fargoth World Building Project is a collaborative effort to design a generic fantasy setting for any game system
Farland - An extensive and rich setting with a nice website, for d20.
Gwenthia - A shared fantasy world developed primarily for RPGs, and being delivered through wiki, ftp site, and published documents.
Heptovania - A really big vanilla fantasy RPG setting: 1500+ articles!
Ilshara: Lands of Exile - A well done campaign setting, with PDFs for download, for Casles & Crusades.
Kalyr - A GURPS game world where humans are slaves imported to an alien planet.
Korinth & Elindra - Two different settings with beautiful websites, for d20.
Maelstrom - This setting also provides great blasons, castles maps, etc.
Meln - A campaign setting for any fantasy RPG system.
Mythosa - A fantasy world with no specific game system tied to it.
Palaestra - A fantasy setting with a "Byzance against Faery" theme, for d20
Santharia - Another massive fantasy world, heavily TOLKIEN inspired, with beautiful website, lots of stuff, and online RPG
Scroll of Tian - A world of deserts, jungles and high magic, for d20.
Shadowfell - A dark world where humans have chased away most of the other races.
Sulerin - A really extensive D&D world.
Tempest - The WIKI vanilla fantasy setting to which you may contribute, for d20.
Terra-Viejo - An alternate-Earth fantasy world, for d20.
The Hyborian Age - Conan's world (not the Mongoose Publishing version) for d20.
The Northland - A typical fantasy setting, probably for AD&D or d20.
The Oriental Hardpoint - An Asian/Oriental campaign setting, for d20.
Thyrenacia - Another massive fantasy world, human only (no elves, etc.), emphasizing on politics; no specific RPG.
Urbis - A World of Cities, for d20. - A world currently going through a magical industrial revolution, with vast city-states dominating the landscape.
Virtual Verduria - A peculiar fantasy world, some humans from Earth stumbled upon by accident long ago.
World of Highland - An alternate-Earth fantasy setting, with its own RPG system.
World of Khoras - An extensive campaign setting for any fantasy RPG system.