Genet Models offers some free paper models for Dropships, Shuttlecraft, a Science Fiction Tank that looks like it is from the movie Aliens, and some science fiction style warehouses.
The Miniature Wargaming Editor
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.
Modeling Trees For The Great War
The Wargames Table has a nice article on modeling trees for The Great War. The trees also look to me as though they would be nice for a deadlands type of fantasy setup.
Final Round WWII Skirmish Game
Final Round is a set of free wargames rules for WWII skirmishes.