World Building

Timeline Generator - A web-based application that creates generic random events for a nation or region. The user can specify the starting year, number of years, and events per year.
http://www.fantasist.net/timeline.shtml

Worldbuilding - Indexed links reviewed for their relevance to gamemasters. With additional information on conlangs, fantasy names, and fictional religions.
http://www.bmarch.atfreeweb.com/Worldbuilding.htm

Magical World Builder's Guide - Suggestions for creating consistent magic themes for fantasy settings, as well as general world building advice and resources.
http://www.web-writer.net/fantasy/

Criar Mundos - Building Worlds - A step-by-step guide for creating original settings and incorporating realistic details. Various resources and references. In English and Portuguese.
http://criarmundos.do.sapo.pt/

World Builder Projects - Starting place for information on how to build an imaginary setting.
http://hiddenway.tripod.com/world/

World Building - An example of designing a planet, from basic physical assumptions to geography to weather systems and archeological remains.
http://www.suite101.com/welcome.cfm/world_building

Rich Staats' RPG / World Building Articles - Many interesting original and adapted articles of all aspects of gaming worlds, with much of interest to world builders.
http://www.geocities.com/dr_games/staats2.htm