6+ Rules are a set of rules for the horse and musket period in 6mm. It uses no dice
Rules: 18th Century
Warhammer French and Indian War
Warhammer French and Indian War is a set of free wargames rules based on the Warhammer English Civil War rules.
French and Indian War Skirmish Rules
Andy Watkins has these free simple skirmish rules for fighting miniature battles set in the French and Indian War. These rules belong to the “less is more” category.
Fur Wars II
Fur Wars II is a set of adaptations of the commercially available Pig Wars rules. Fur Wars is for the French and Indian War.
Cold Steel Miniatures Rules for 1690 to 1850
Cold Steel is a set of free wargames rules for the period 1690 to 1950 offered by Historic Enterprises. The first release offers the basic rules, plus specific addendums for the Wars of Napoleon and the War of 1812. The nice thing about the rules is that they offer a flexible scale system, with each figure representing between 5 and 60 men. This should allow you to fight a wide variety of battles with the same rules set.