D3 French and Indian War is a set of free wargames rules designed for play on a 6 inch square grid.
Rex Hurley has written a set of free wargames rules for playing Last of the Mohicans with 25mm – 28mm wargames miniatures. The rules are relatively simple, and include statistics for all of the main characters, such as Hawkeye, Uncas, Chingachgook, Magua, et. al.
There’s also a page of pictures for inspiration.
This Yahoo group has free wargames rules for recreating battles of the Indian Wars in the Old Northwest: the French and Indian War through the Blackhawk War.
Black Powder is a set of free wargames rules by Wes Rogers for skirmish warfare in the period 1600 – 1870.
Warhammer French and Indian War is a set of free wargames rules based on the Warhammer English Civil War rules.