Demo Index: Simulation
Offers free game demos with information, and screenshots.

Games: Video Games: Simulation - Open Site
A volunteer-run encyclopedia categorized by genre. Includes information, review overviews, hints, release dates, and artwork.

MiGMan's Combat Diary
Hints, tips, maps, checklists and in-depth playguides for over 200 Flight, Land, and Space Combat sims.

Mods to the Max
Mods for roller coaster simulations, including Disney Coaster, Roller Coaster Tycoon 3, No Limits, and Scream Machines. Offers modules, tools, and forum.

The Simulation Site
Includes downloads and information on a variety of games.