Postcard from the Revolution is a free wargame that fits on a postcard.
This photo tutorial offers great instruction on modeling an Iroquois style Indian longhouse.
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.
A Miniature History of the American Revolution blog has a set of printable flags for the Continentals.
Here’s a website with lots of information on smuggling in Britain in the 18th Century. I think there’s lots of gaming potential here.