Mantic offers free rules for their Dungeon Saga game.
rules
War of the Triple Alliance Rules
Natholeon’s Empire offers a set of free wargames rules for the War of the Triple Alliance.
The War of the Triple Alliance, also known as the Paraguayan War, was fought between 1864 and 1970 between Paraguay and the Triple Alliance of Argentina, Brazil, and Uruguay. Percentage-wise, it was one of the most devastating wars in history, with Paraguay losing 70% of its adult male population.
Wild West Shootout
From Gettysburg Gamers: a set of free wargames rules for Wild West shootouts.
Savage Survive Skirmish Rules
Savage Survive Skirmish is a set of free wargames rules for games set in a post apocalyptic winter.
Franco Prussian War Rules
Natholeon’s Empires offers a set of free wargames rules for the Franco Prussian War.