In the Jungle is an interesting set of rules for conquistador vs aztec games. It’s played on a gridded board and is supposed to simulate a group of “lost” conquistadors trying to find their way to a temple without falling victim to sacrifice.
Rules: Pike and Shot
Bushido New Dawn Rules
Bushido New Dawn is a set of free wargames rules for Japanese Fantasy/Myth skirmishes.
Pikette Squared Renaissance Rules
Pikette Squared is a set of free wargames rules for playing games set in the late medieval and renaissance period.
English Civil War Rules
Alan Tidders’ free wargames rules for the English Civil War are his own modifications of the Jackson Gamers’ rules set.
Tree of Battles 14th – 15th Century Wargames Rules
Tree of Battles is a set of free wargames rules for battles of the 14th to 15th Centuries.