Criar Mundos
Tips and advices on creating world and environments for RPG games and storylines.
Domus Project
Includes helpful aides in world building and links to other world building sites.
Timeline Generator
Simulates history of kingdom. One would just type the kingdom name and dates of the projected history and then a ready-made outline would pop out.
World Building
Simulates a fantasy world by accretion. Discusses what is accretion and how it can help in the content of RPG.