Captains Bold is a free print-and-play game for the age of sail. It focuses on duels between frigates.
Rules: Napoleonics
Bugle and Shako Quick Play Napoleonic Skirmish Rules
Bugle and Shako are a set of free wargames rules for quick playing Napoleonic askirmish games.
Men O’ War Napoleonic Sail Rules
Men O’ War is a set of free wargames rules for Napoleonic sail. The rules are aimed at small actions, with one or two ships per player.
One Page Napoleonic Rules
Land of the Lead has a set of one-page Napoleonics Rules. They’re designed for play with a “reinforced division” per side. Scroll down to the bottom of the page to find them.
The Immortal Memory
The Immortal Memory is a set of rule for refighting Trafalgar.