Munera Sine Missione, Exagoni Libero is a set of free wargames rules for gladiator combat. It is based Munera Sine Missione, but unlike that set doesn’t use a hex mat.
rules
WWII Operational Level Rules
Here’s a set of free wargames rules for operational level actions during WWII. Battalions are represented on a 2×2 base, and the entire thing is inspired, it seems, by Volley and Bayonet.
Krieg Ist Mist WWII Rules
Krieg Ist Mist is a set of free wargames rule for 6mm games set in WWII.
Yanks Up The Yangtzee
Yanks Up The Yangtzee is a set of free wargames rules for skirmishes along the Yangtzee river in the 1920s and 1930s.
Two Page Tricorn
Two Page Tricorn is a set of rules for 18th century warfare. It is designed for the quick resolution of large scale battles, ideally using 6mm figures.