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.
Republished by Blog Post Promoter
Braid and Cockade is a set of free wargames rules for game set in the 1750 - 1850 era.
Scott Mingus offers a Johnny Reb variant for playing the American War of Independence.