A Town Called Malice is a set of free wargames rules for wild west gunfights. The rules set was used by the North London Wargames Group for their 2015 club convention game.
The Miniature Wargaming Editor
The Games: Blood and Spectacle Gladiator Rules
The Games: Blood and Spectacle is a set of free wargames rules for gladiatorial combat in ancient Rome.
One Man One Gun Rules For Plastic Army Men
One Man One Gun is a set of free wargames rules for plastic army men.
OMOG Musket Rules
OMOG Muskets is a set of free wargames rules for small unit actions in the horse and musket era, 1700 – 1849.
Building A Western Gaming Table
The Great Escape Games forums have a very nice photo tutorial on making a western mine gaming table.