Phil Johnson and Les Benoot offer a pdf download of fog of war rules for the horse and musket era. These are a generic add on for other horse and musket rules sets, and are intended to reflect the problems offered by visibility and scouting on command control.
I’m currently painting some of Wargames Foundry’s Plains Indians for a 7th Cavalry game. I found this site, with descriptions of symbols that the Native American warriors painted on their horses.
David Manley has written campaign rules for the 1782-1783 naval campaign between the French and British off the coast of India. Manley writes:
Between February 1782 and June 1783 the fleets of French captain Pierre Andre de Suffren de St. Tropez and British Vice-Admiral Sir Edward Hughes fought a series of naval actions along the Indian Coromandel coast in what has become one of the most popular campaign settings for wargamers of the age of sail. Five actions, all largely inconclusive and fought between fleets that were relatively equal in numbers, were fought on the Coromandel Coast, at Sadras, Providien, Cuddalore, Negapatam and Trincomalee.
Rex Hurley has written a set of free wargames rules for playing Last of the Mohicans with 25mm – 28mm wargames miniatures. The rules are relatively simple, and include statistics for all of the main characters, such as Hawkeye, Uncas, Chingachgook, Magua, et. al.
There’s also a page of pictures for inspiration.
Hex Command Gunpowder are a set of free wargames rules for the horse and musket era. They are designed for a 1 stand = 100 men scale. The authors write:
These rules were designed to bring a simplification to wargaming with miniatures because it resembles a board game more than a complicated historical simulation. These rules are intended for any horse and musket era and with slight modifications can be used for any conflict in that range.
These rules do not consider formations as influencing the outcome of battle, other than if a unit is ordered or disordered, because the system compensates for the effects of various tactical realities. The game is intended to be played on hex grid pattern of 4 inch hexes, though this is
not required (numbering each hex is essential for playing via the internet), with the top left corner being a whole hex, and the hexagon orientation being that the flat top and bottom are parallel with the long sides of the surface (hexes are not “pointed up”). Game Mapper is
recommended to assist scenario creation and game tracking.