Simmers Paint Shop
- Offers information and resources for making repaints and skins for various flight simulators. Also a meeting place for repainters and skinners of various communities.
- http://www.simmerspaintshop.com

Society of WWI Sim Artisans
- Creates skins and planes for World War One simulators.
- http://www.swwisa.net/

Flight Sim Network
- Contains links and information.
- http://www.flightsimnetwork.com/

The Scenery Hall of Fame
- Includes flight simulator scenery add-ons.
- http://www.scenery.org

Project Magenta - High End Flight Simulation
- Creates flight simulation add ons.
- http://www.schiratti.com/

How In the World?
- Developers of flight simulation add-ons.
- http://ftp.avsim.com/library/esearch.php?Name=&FileName=&Author=how+in+the+world?&Description=&CatID=Root

MLK Air Base
- Add-ons and improvements for flight simulators.
- http://www.mlk-airbase.wz.cz/

Comiato Headquarter
- Contains utilities and add-ons for flight simulator and x-plane.
- http://www.pentaonline.it/comitato_hq/index.html