Periplus is a free two player wargame that abstracts a battle between two fleets of ancient greek warships.
Wooden Ships and Iron Men Lite is a set of free wargames rules The author writes that Wooden Ships and Iron Men Lite are:
A rules set that focuses on fighting small squadron actions in the late 18th and early 19th Century using Pirates of the Spanish Main/Crimson Coast/Revolution (hereafter called PoX) ship models. I hope this variant is almost as simple and as colorful as Battle Cry and Memoir ’44 and captures the spirit of the Age of Fighting Sail
WarpSpawn offers Commodore, a two player card game of Napoleonic fighting sail.
Malta Convoy is a WWII Simulation of the Allied relief convoy to the British island stronghold of Malta in August 1942.
It looks pretty good, and I think there’s the basis of an interesting campaign game here.
Mike, the Mad Game Designer has produced more than 7,000 ship counters for use in naval wargames. They cover various navies from 1900 to the present.
I’d suggest that you print them out and then glue them to small blocks of wood for a 3-D feel.
An amazing gift to the wargames community.