Centre Rock is a free download and build board game from Rocket Ship games. It can be played with the included counters, but more interesting to me are the photos of the game being played with miniatures.
Miniatures Rules
Empire of Liberty AWI Rules
Empire of Liberty is a set of free wargames rules for playing the American Revolution. They fit on just two pages.
Direct PDF Download of Empire of Liberty. Author’s Page (I gave the direct download because the page is caught up in one of those infernal webring loops.)
Battlefleet 1900 Pre-Dreadnought Naval Warfare: 1890-1905
The War Times Journal has a set of free Pre-Dreadnought Naval Warfare rules, designed for 1/3000 scale miniatures.
Bloodybacks AWI Rules
Bloodybacks is a set of free wargames rules for the American War of Independence by Stephen Jones.
Direct PDF Download of Bloodybacks American War of Independence Rules.
American War of Independence Rules
This set of free wargames rules for the American War of Independence is designed for 25mm/28mm rules at a scale of 1 figure = 10 – 20 men. Direct Download Word File: American War of Independence Rules