That list would be way too long and take weeks to compile! :)
What are your interests and we can name a few...
Some of the big players are:
Real Air Simulations (the RealAir Spitfire may be the greatest add-on for FS ever...)
Carenado
IRIS
Shockwave
Lago
Alphasim
Skyunlimited
Aeroplane Heaven
Two companies I would not recommend:
Abacus (not great quality planes, though FSDS is indespensible)
Ariane (because it is owned by Peter Tishma and that is a VERY old story)
The history of Abacus...>>>>
About Abacus:
"Abacus is a publisher of quality software and computer books. We've been developing and publishing software for the home consumer since 1978 making us one of the pioneers in the personal computer industry........".
http://www.abacuspub.com/default.html
I can remember them back in the old 8-bit Computer days, (Apple 2e, Spectrum 48K, Commodore 64, Atari, etc.), and one of the few companies remaining, and still going strong...

...and isn't our Felix associated with them in some way?...

Paul...8-bit nostalgia...
