Chevauchee is a set of free wargames rules for man-to-man combat during the 100 Years War.
Rules: Medieval
Medieval Skirmish Rules
Lord Merlin has a set of free wargames rules for large (70mm or 1:20) scale figures. There are three levels to this skirmish rules set: “simple”, “better” and “more realistic.” There also are some cute pictures of a “knights of the dinner table” game.
Wars of the Roses Skirmish Rules
The Cool Guy or Dweeb site offers a set of Wars of the Roses skirmish rules.
SMART Gaming Fantasy and Medieval Rules
SMART stands for Simple Miniature Adventure Rules and Tactics. They’re a set of free wargames rules for fantasy and medieval gaming.
Roses Of The North Wars of the Roses Skirmish Game
Roses of the North is a set of free wargames rules for Wars of the Roses skirmishes.