Blunders on the Danube Blog has a set of free wargames rules for ancients battles based on Charles Sweet’s classic set.
Rules: Ancients
Quick Ancients
Fr. Aelred Glidden, who was a frequent contributor to the late, lamented wargames magazine MWAN offers Quick Ancients, a set of free wargames rules for
Napnuts Masters of the Mediterranean Campaign
Masters of the Mediterranean is a set of campaign rules for ancients.
Neolithic Caveman Rules
Neolithic is a set of free wargames rules for battles with cave men.
Naumachiae Ancients Naval Rules
Naumachiae is a set of rules for ancients naval warfare for 1/12000 miniatures.