The Perfect Captain has upgraded the graphics for their free John Bull / Patriots game for the War of 1812 and the American Revolution.
Tony De Lyall offers a free Windows program to automate the American War of Independence miniatures rules written by Will McNally.
Johnny Tremaine is a variant of Johnny Reb, created with the permission of the Civil War game’s author, John Hill.
The Junior General has a game of the Battle of Saratoga (1777), complete with paper figures for you to play with.
Washington’s Fury is a set of rules for wargaming the American Revolution. Unfortunately, it’s at Yet Another Yahoo Group, so if you want to take a look, you’ll have to join. I did, and they are definitely something I want to give a try.