All of my games are available to everyone for free.
However, if you enjoyed any of my games, a couple of bucks to cover website hosting costs and support my ongoing efforts would be gratefully appreciated. I think $2 per game enjoyed is a fair price. Thanks.
Dropbox (250MB Extra space)
Penzu (20% off yearly subscription)
Hole in the Wall Hosting ($10US per year for 300mb space, 30gb bandwidth)

Heh, the 'Space fighters' in the game handle a lot closer to an aircraft than an actual space craft, so it kind of technically is a flight sim.
Haven't played Borderlands yet, will have to keep an eye for specials on Steam.