We currently offer a massive range of downloads for FSX, as well as older flight simulator add-ons for the ever-popular FS2004, FS2002, CFS3 and now becoming ever popular with dediced virtual aviators is Laminar Research's X-Plane series.
Sascha Felix and Volker Heine have just released version 8.1 of their popular FlightSim Commander. The upgrade file is available at www.fscommander.com. New features include extended IVAO and VATSIM support, connection to IVAO Teamspeak server, start parameters for FS2004 and FSX, added features for online pilots and controllers, improved Database Manager, and many more.
You need to have v8.0 properly installed in order to use the upgrade file.