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.
horse and musket
Fast Play Rules For The Seven Years War
Fast Play Rules For The Seven Years War is a set of free wagames rules for mid 18th century games.
Direct Download In Word Format of Fast Play Rules For The Seven Years War
Close Files and European Order 18th Century Rules
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.
All The King’s Men Horse and Musket Rules
All The King’s Men is a set of horse-and-musket rules designed for 54mm figures.
8e Cuirassiers 1700 – 1870 Rules
8e Cuirassiers 1700 – 1870 is a set of free wargames rules for the horse and musket period. An infantry battalion is represented by four bases.