Richard Bradley’s Seven Years War rules are designed for 15mm figures on a 40mm frontage.
rules
Richard Bradley’s Pike and Shot Skirmish Rules
Richard Bradley offers a set of Pike and Shot Skirmish rules.
Richard Bradley’s Colonial Skirmish Rules
Richard Bradley offers a set of Colonial Skirmish Rules.
Sword and Dagger Medieval Skirmish Rules
Sword and Dagger are a set of free wargames rules for medieval skirmishes. They’re very straightforward and at 11 pages, probably good for beer and pretzels games.
Fistful of TOWs Introductory Rules
Ty Beard offers an introductory set of his Fistful of Tows rules for modern warfare.