By The Gods is a set of free wargames rules for ancients warfare. The rules are relatively uncomplicated, but do have some modifications for “national characteristics.”
Rules: Ancients
Bronzed Heroes Classical Warfare Skirmish Rules
Bronzed Warfare is a set of free wargames rules for skirmishes in the classical bronze age.
Death On The Seas Ancient Naval Rules
Death on the Seas is a set of free wargames rules for ancient naval warfare. Also, Death On The Seas ship appendix.
Thumbs Up, Thumbs Down Gladiator Rules
Thumbs Up, Thumbs Down is a set of free wargames rules for gladiatorial combat. The rules are designed for up to ten players.
Charge! Fast Play Ancients Rules
Charge! is a set of fast play ancients rules from Tom Hinshelwood.