Space Fury are a set of quick and dirty space fighter combat rules.
Miniatures Rules
Star Wars – The Force Awakens
Totally Geeking.
Italian Wars Renaissance Rules
Italian Wars is a set of free wargames rules for games set in the Renaissance.
Fallout Wasteland Warfare Game
Mophidus is offering free PDF core rules for their Fallout Wasteland Warfare game, based on the Fallout video game series. They also are have a free Fallout: Wasteland Warfare Getting Acclimated pdf with some basic scenarios and a guide to help start play. Other free offerings are Fallout Wasteland Warfare Dice and Ruler Info and high res player cards.
Bushi Samurai Rules
Bushi is a set of free wargames rules for Samurai warfare. Each stand represents a band of warriors. Two bands equal 500 men.