Richard Bradley has a set of WWII Coastal Warfare Rules. This is a period I’ve always wanted to play.
Miniatures Rules
Greater Space Battles
Greater Space Battles is a set of solo rules for space battles using miniatures from Solipsist Games.
Familia Gladiatoria Gladiator Rules
Familia Gladiatoria is a set of free wargames rules for gladiator campaigns.
Iron and Steam Rules
Iron and Steam is a set of free wargames rules for pre-dreadnought Victorian naval actions.
Iron and Steam is a set of miniatures rules for naval combat of the American Civil War. The rules feature a gun-by-gun combat resolution, written orders and simultaneous movement. Traditionally played with 1/600 scale models the combat scale is closer to 1/2400 scale, though the game is generally model scale agnostic. Also included are over 100 pre-filled ship record sheets, turning radii and arc-of-fire templates as well as a 2 page QRS to facilitate fire resolution.
ACW Rules For River and Coastal Warfare
By Jeff Peach & Les Booth offer a set of free wargames rules for ACW River and Coastal Warfare