The Miniature Wargaming Editor Munera Sine Missione is a set of free wargames rules for gladiatorial combat. Author Alan Saunders writes that these are:
Gladiatorial combat rules, using a hex grid. Simple armour and weapon categories make it easy to use your favourite figures, whilst a single bout plays to a conclusion in less than 15 minutes, making it suitable for campaign play in an evening.
Spandau and Lewis is a set of free wargames rules for WWI aerial dogfighting.
Clobberin’ Time is a set of rules for fast superhero skirmishes.
El Alamein is Lou Coatney’s old school board game covering North African battles during World War II. Just download, print and play.
The classic Star Trek shuttlecraft Galileo is available as a free paper model.