Postcard from the Revolution is a free wargame that fits on a postcard.
american revolution
Charles Sweet’s American Revolution Rules
Here’s a set of classic wargames rules from 1969: Charles Sweet’s American Revolution rules.
Guilford Court House Order of Battle and Scenario
A Miniature History of the American Revolution has orders of battle for Guilford Court House, the famous battle in the Southern Campaign of the American Revolution.
American Revolution Flags
A Miniature History of the American Revolution blog has a set of printable flags for the Continentals.
American War of Independence DBA Variant
From Paul Potter, a variant of DBA for the American War of Independence.