Heroes of Victoria’s Empire is a set of free wargames rules for heroic actions in the colonial era.
Square Hearts is a set of free wargames rules for colonial wargames in the 19th and early 20th centuries. It’s played on a square grid.
Bob Berman offers a set of free fast play wargames rules for the Indian Mutiny, based on “a number of sources, including “From MacDuff to the Frontier” and “The Sword and the Flame.” They are designed for fast play, with all players on one side.”
Here are a set of houserules called Fields of Honor. I can’t tell whether they’re houserules FOR the Fields of Honor set, or a set of houserules BASED on Fields of Honor. I lean toward the latter. They look like a fairly complete set that bears more than a passing resemblance to the original Fields of Honor set published a decade or so ago by Pinnacle.