Medieval Mayhem is a set of free wargames rules for medieval battles. The author writes:
Put your tin soldiers on the table and play a medieval battle for an evening’s entertainment. See your soldiers rush the enemy, fight or flee while you desperatly try to control them. Medieval Mayhem is a game where your soldiers have a will of their own.
In the Free Company Yahoo Group, there is a set of free wargames rules for medieval skirmishes called Foray.
The Scot and Welsh Wars is a set of free wargames rules for medieval battles circa 1277.
Chevauchee is a set of free wargames rules for man-to-man combat during the 100 Years War.
One Monk offers a set of paper medieval buildings and paper medieval figures.