The DFW Grognards have published a set of ACW Campaign rules.
rules
L’Orre Mixte Napoleonic Rules
L’Ordre Mixte is a Napoleonic Supplement to Fire and Fury.
Killzone Survival Warhammer 40 Skirmish Rules
Killzone Survival is a set of fan created rules for skirmishes in the Warhammer 40K Universe.
Give Them Cold Steel Civil War Rules
Give Them Cold Steel is a set of free wargames rules for the American Civil War.
Struggle Against Everything and Everbody Mexican Revolution Rules
Struggle Against Everything and Everybody is a set of free wargames rules for the Mexican Revolution of 1910 – 1920. It’s a period I’ve long wanted to game.