The Perfect Captain offers the second edition of John Bull / Patriots, their rules set for game of the American Revolution and War of 1812. These are the most visually striking rules sets available today — either commercially or free. And these are FREE!
Rules: 19th Century
Stormed At With Shot and Shell Crimean War Miniatures Rules
Stormed At With Shot and Shell is a set of free miniatures rules for playing games set in the Crimean War. They’re designed for 15mm figures.
Maxims and Mausers
Maxims and Mausers is a set of free wargames rules for European Wars from the 1870s. From the website:
Maxims and Mausers covers European Wars at the moment. Inclusion of Colonial Conflicts is planned. These are very simple rules. That may be played either as a board game on a hex map or as a miniatures game on large hexagons decorated as terrain.
Age of Sail House Rules For Savage Worlds
Tim’s Miniatures Blog has some Age of Sail House Rules for Savage Worlds. He also has some Savage criticism of those who wrote the Pirates of the Savage Main rules.
Indian Wars Rules
Fred Diamond offers a free and simple set of miniatures rules for playing pony wars — US Cavalry vs Indians.