Empires of the Seas is a set of rules for the Age of Fighting Sail. The author says that the rules allow battles between large fleets without lots of record keeping.
rules
Tercios Brevis Editio
Tercios Brevis Editio is a free version of the Tercios rules for the Thirty Years War.
Napoleonic Wars Rules
Natholeon’s Empires offers a set of free wargames rules for the Napoleonic Wars.
Dungeon Saga Free Rules
Mantic offers free rules for their Dungeon Saga game.
War of the Triple Alliance Rules
Natholeon’s Empire offers a set of free wargames rules for the War of the Triple Alliance.
The War of the Triple Alliance, also known as the Paraguayan War, was fought between 1864 and 1970 between Paraguay and the Triple Alliance of Argentina, Brazil, and Uruguay. Percentage-wise, it was one of the most devastating wars in history, with Paraguay losing 70% of its adult male population.