Third Wire, makers of the Strike Fighters/Wings over and Strike Fighters 2 series, are having a 30% sale on everything in their inventory – that means a complete, modern combat flight sim for $20. DRM free, direct download from their site. Remember: TK and his tiny band of brothers are indie developers who need sales to buy their dinners! Support them!
Need more? Here is a nice movie of Strike Fighters 2: Isreal
And some screenshots from various of their titles (click for full size):