Spandau and Lewis WWI Dogfighting Game

Spandau and Lewis is a set of free wargames rules for WWI aerial dogfighting.

Fast Play Jet Combat

Fast Play Jet Combat is a set of free wargames rules for 1/600 aircraft on a hex grid. Interestingly, it requires a d100 die. If you don't have one handy (and who does), you can do the same thing with two d10s in different colors.

Fokker Fodder

Fokker Fodder is a set of free wargames rules for World War One aircraft battles. The rules are designed for both single battles, and for campaigns.

Crimson Eagles Pulp Air Combat Rules

Crimson Eagles is Michael Reitz's mash-up between the old FASA Crimson Skies pulp aircraft rules and the Canvas Eagles WWI rules.

Knights of the Sky WWI Aircraft Rules

Knights of the Sky is a set of free wargames rules for WWI Aircraft.