Richard Bradley’s State of War ACW Skirmish Rules are available at the Tyneside Wargames Club site.
skirmish
Bad AR:SE Modern Skirmish Rules
Bad AR:SE is a set of free wargames rules for modern skirmishes.
Late Medieval Skirmish Rules
The Late Medieval Skirmish Rules is a set of free wargames rules for large scale figures on an actual dining room table (with salt shakers, etc.)
Richard Bradley’s Samurai Skirmish Rules
The prolific Richard Bradley has a set of free wargames rules for samurai skirmishes.
Richard Bradley’s Pike and Shot Skirmish Rules
Richard Bradley offers a set of Pike and Shot Skirmish rules.