Creative Conclave
A collaborative effort to create an original fantasy world for use in role-playing games and writing.
Fantasy World Builders Forum
Fantasy world builders discussion about deities, races, geography, curious characters, classes, and locations.
World-Building Home Page
The World-Building Email list is intended to serve as a public forum for discussion of topics concerning the writing of fantasy, science fiction, and horror. Topics discussed range from anthropological questions about creating a fictional culture, to historical questions about model cultures, to practical concerns facing every writer.
Yahoo! Groups: rpg-tools
Mailing list and group to share information about tools useful to people creating imaginary worlds and using them for storytelling, writing, roleplaying or wargaming.
Yahoo! Groups: world-create
Forum for world creation and development.