Tree of Battles is a set of free wargames rules for battles of the 14th to 15th Centuries.
pike and shot
Koku Samurai Warfare Rules
Koku is a set of basic Samurai warfare rules with a mechanism for purchasing your troops.
Richard Bradley’s Pike and Shot Skirmish Rules
Richard Bradley offers a set of Pike and Shot Skirmish rules.
Argad Medieval Skirmish Rules
Argad is a set of free wargames rules for skirmishes in the dark ages and for pirates in the 17th and 18th centuries.
Victory Without Squares
Victory without Squares is a modification of the Victory without Quarter English Civil War Rules System. Both are free wargames rules, with the “without squares” version using inches, rather than squares for movement and range.