Fire and Fury Francese, from Nick Dorrell, is a variant of my all time favorite wargaming rules set, Fire and Fury. Whereas Fire and Fury is designed for the American Civil War, F&F-F is for playing miniatures games set in the European wars of the mid 19th century, such as the Crimean War and the Franco Prussian
English Civil War is a modification of the Horse & Musket/Pike & Shot rules in Neil Thomas’s ‘One Hour Wargames.’
Make magazine has an article with several valuable links on making your own high end gaming table for $150.
Alan Saunders offers Great Northern War, a set of free wargames rules that he describes as:
A heavily modified version of the Horse & Musket/Pike & Shot rules in Neil Thomas’s ‘One Hour Wargames’ specifically for use with the Great Northern War.
See The Elephant is a set of free wargames rules for the American Civil War played on a chess-like grid.