Warflag has some modifications for the commercial Age of Reason rules to allow you tu use them to fight battles in the Age of Marlborough.
Miniatures Rules
D-Day 1/72 Scale World War II Miniatures Rules
Brian Gills D-Day Rules are designed for 1/72 scale wargames miniatures.
Bugs Miniatures Rules
Brian Gill offers Bugs!, a set of miniatures rules for staging battles with large numbers of plastic insects.
The Caveman Clash Manual
Caveman Clash is a set of free wargames rules for playing skirmishes between cavemen. There also are paper figures if you don’t happen to have cavemen available.
Firefight 2050 Rules
Patrick Todoroff offers Firefight 2050, a set of rules for 1/72 figures in a near future setting.