Axemen and Allies is an fantasy/medieval variant for Axis and Allies.
medieval
Mudgrunt Medieval Skirmish Rules
Mudgrunt is a set of free wargames rules for medieval skirmishes. The rules are based on the Stargrunt II science fiction rules set.
Feudal Warfare
Wes Rogers offers set of free wargames rules called Feudal Warfare, described as a “fairly simple set” of convention rules.
War of the Red and White Wars of the Roses Rules
War of the Red and White is a set of free wargames rules for multiplayer Wars of the Roses Games.
My Kingdom For A Horse Wars of the Roses Rules
My Kingdom For A Horse is a set of free wargames rules for playing games set in the medieval and Wars of the Roses period.