Nigel Lancaster has written a set of abstract modern air war rules called Instant Thunder, and has graciously permitted MiniatureWargaming to host them. This is a major work, with 28 pages of rules, aircraft and missle lists, and designers notes.
Wargamer and Teacher Matt Fritz has written MiG Madness, a set of free wargames rules for playing air combat in the Korean War.
Canvas Eagles is a set of free wargames rules for WWI Dogfights
Rabbidgerbal’s Biplane Dogfight Game is a set of free wargames rules for WWI era aerial combat.
The Battle of Britain is a complete strategic game for refighting the epic battle of 1940.