Fast Large Air Combats is a set of free wargames rules for WWII air combat game using 1:144 or 1:100 scale miniatures. The rules are designed so that a single player can control multiple aircraft.
Miniatures Rules
A Place In The Sun African Colonial Rules
A Place In The Sun is a set of free wargames rules for southwest Africa from Greg Novak. The download link is on the upper right side on the landing page.
One Page Fantasy v 2.0
The One Page Fantasy rules are designed as a simpler alternative to Warhammer Fantasy Battle.
Panzer Clash Print-and-Play Card Game
Panzer Clash is a free print-and-play card game with a World War II theme for 2-4 players. From the BGG decription:
Pick a side, either Axis or Allies, and build a deck of 40 cards out of a pool of 100 different cards in order to defeat your enemey.
The deck or Supply contains Factories, Units, Events and Terrain Modifiers. Factories are needed to build Units and Terrain Modifiers as well as to power Events. Units and Events, which usually belong to one or more of the four factions (Germans, Japanese, Americans and Soviets) are used to attack and deal damage to the opponent, have certain beneficial effects on the game or are used to weaken the opponent. For each point of damage a Player receives through Units and Events, he or she puts one card from his or her Supply (deck) onto his or her Junkyard (discard-pile). Is a player unable to draw a card from the Supply, he or she loses immediately.
Far Trek RPG
Far Trek is an RPG set in the Star Trek Universe. It’s one I’d love to play.
There are also paper figures for away teams and aliens.