Nauta is a set of free miniature wargames rules for playing out ancient naval battles. The files are hosted here:
Miniatures Rules
Age of Sail House Rules For Savage Worlds
Tim’s Miniatures Blog has some Age of Sail House Rules for Savage Worlds. He also has some Savage criticism of those who wrote the Pirates of the Savage Main rules.
Frag Bughunt
Bughunt is a variant for Steve Jackson Games’ Frag. The game represents a skirmish between space marines and carnivorous aliens.
Extra Terrae Crepusculum Fantasy Skirmish Game
Crunch Waffle Games offers Extra Terrae Crepusculum, a free fantasy skirmish wargame designed to allow you to use miniatures from any other game system or line. Crunch Waffle is of course, a miniatures company and surely hopes that this will spur sales. It’s a great idea. I’ve long thought that miniatures companies should give away their rules to sell the miniatures — sort of the Gillette theory of game sales: give away the handle and charge them for the blades.
Steel Rain Sci Fi Rules
Steel Rain is a set of rules for 1/300 scale science fiction miniatures.