Legio Wargames offers Shieldwall, a set of free wargames rules for Dark Ages battles in the British Isles and Northern Europe.
The Miniature Wargaming Editor
Build A Cheap and Quick Wargames Table
Here’s some good advice on quickly building a relatively inexpensive wargames table.
Tacship Space Fighter Combat Rules
Tacship is a set of free wargames rules for space combat by John Tuffley. He writes:
Tacship is a simplified fast-play rules system for simulating combat between manned space fighters. The game may be played on a hex grid map or on a plain table area by substituting inches for hexes and measuring turns in 60 degree increments (the same as a one hexside facing change). Fighter models should be mounted on stands, preferably with a one inch hex base, if a grid is being used.
Modified Morschauser 19th Century Rules
Bob Cordery offers a set of Modified Morschauser 19th Century Rules. They’re based on the original set by Joseph Morschauser. It’s played on a gridded battlefield
Fusion: Asteroid Mining Print and Play
Asteroid Mining is a free print and play solo game where you manage your mining business while avoiding police and taxes.