There’s been an update for the free basic rules for Impetus, a set of ancient and medieval wargames rules.
Miniatures Rules
Flying Circus WWI Air Rules
Flying Circus is a set of free wargames rules based on the old Avalon Hill Mustangs game.
Banners and Billhooks
Banners and Billhooks is a set of free wargames rules for historical “imagi-nation” wargaming in the medieval period.
Star Wars Miniatures Mass Battles Conversions
Arthur Chang has written a set of add-on rules for playing massed battles with the Wizards of the Coast rules for Star Wars miniatures.
Ancients By Ral
The Jackson Gamers offer Ancients By Ral, an ancients version of the venerable Rules By Ral system.