Simutrans:Official site. A free economic and transport simulation for Linux, BeOS, or Windows.
Simutrans Centre: Development news, references and config tool SimuConfig.
Simutrans Unlimited Project - North America: Information, instructions, downloads, and development center including bug list.
Simutrans Websites Ring: Sites with information about Simutrans.
Simutrans-Tips.com: Tutorials, tips, links, and downloads.
World of Simutrans: Fan site with instructions, tips, and downloads.
Yahoo! Groups : Simutrans: Archive of several years of hundreds of monthly messages.