Eagles and Emperors is a set of free wargames rules for the Napoleonic period based on a set of Civil War rules called The Blue, The Grey and the Butternut.
Miniatures Rules
State of War ACW Skirmish Rules
Richard Bradley’s State of War ACW Skirmish Rules are available at the Tyneside Wargames Club site.
Castles, Cogs & Chevauchées
Castles, Cogs & Chevauchées is a set of campaign style rules for skirmish level combat using the Knights and Knaves skirmish rules.
Knights and Knaves rules at the same link
Coastal Warfare Rules
Richard Bradley has a set of WWII Coastal Warfare Rules. This is a period I’ve always wanted to play.
Greater Space Battles
Greater Space Battles is a set of solo rules for space battles using miniatures from Solipsist Games.