La Petit Guerre is a set of free wargames rules for small scale actions in North America in the 17th – 19th century.
Rules: 18th Century
18th Century Warfare DBA Variant
Here’s yet another set of free wargames rules based on DBA. These are for 18th Century European and Colonial Warfare in 6mm.
Fire and Fury America’s Wars
I think Fire and Fury is the finest set of miniatures rules ever written. It has elegantly simple mechanics, fun gameplay and set the standard for high-quality rules presentation.
Now the Fire and Fury people are at work on a version for America’s other “horse and musket” wars: The Revolution, War of 1812, and Mexican War. You can find the playtest versions of Fire and Fury: Americas Wars here.
Gold, Swashbucklers and Pirates
Gold, Swashbucklers and Pirates is a set of free rules for creating a small wargames campaign using gangs.
Most Irregular Horse and Musket Rules
Most Irregular is horse and musket rules extension to the Fast and Dirty skirmish rules, found on the same page.