The Great War Naval Rules is a very comprehensive set of rules for WWI Naval warfare.
Miniatures Rules
Combat Captain WWII Rules
Combat Captain is a set of free wargames rules in which the basic unit is a company consisting of up to eight squads. Author David Raybin says that the rules “allow a high degree of flexibility in unit activity during a turn. The idea is simplicity of play so the game will move along to a satisfactory conclusion in under three hours.”
Camerone: Rules For Captain Danjou’s Last Stand
Here are a set of rules for recreating the 1963 battle of Camerone between the French Foregin Legion and the Mexican Army.
The Mexican Adventure
Howard Whitehouse offers a set of Mexican Adventure Rules for the Legionnaires last stand at Camerone.
Kraken: Victorian Man Against Sea Monster
Matthew Hartley has a game called Kraken, inspired by the man against sea monster scene in Jules Verne’s 20,000 Leagues Beneath the Sea