Legion Wargames offers Close Files and European Order, a set of free wargames rules for playing wargames in the period 1700 – 1720. They’re based loosely on the classic Loose Files and American Scramble.
Corporal John is a set of free wargames rules for the Age of Marlborough. The author writes that:
The set can be used, not only for Marlborough’s wars, but for those of Charles XII, Peter the Great, Louis XIV and even Gustavus Adolphus.
The rules are fast-play but still retain the detail to give the correct flavour of the period. They will handle games of thirty or forty units per side or much smaller games with a handful of units.
Fusilier is a set of free wargames rules for the the flintlock era.
The author writes:
The Flintlock Era
Fusilier is a wargames system designed for the period 1700 to 1815.
The system is designed to be used with any scale of figures. There is no formal figure scale, the unit sizes being dictated by the base sizes, which in turn are based on the frontages of the prototype units. An infantry battalion might be, for example, ten 25mm figures, twenty 15mm figures or fifty 5 mm figures. The ground scale is 1 mm = 1 metre
Furious Reason is a set of free wargames rules that combines Fire and Fury with Age of Reason.
For many years, Wargames Research Group rules were the standard in miniature wargaming. The Wargames Rules: 1685 – 1845 cover the entire horse and musket period, and include useful army lists for Malburian and Seven-Years-War armies as well as the campaigns in India which preceded the Napoleonic Wars. I actually own a print copy of these.