I've found this web site called 'The Perfect Captain'. Their own description of the site is as follows: "We are a small group of gamers with some big ideas! We like to play and design boardgames, miniatures rules, and campaign games for a host of periods. We have a yahoo group that supports our products. By the way, maybe we should mention that our goods are totally FREE! If you'll be so kind as to look below, you'll see a list of products under the headings of their historical periods. Each one of these has its own webpage with a bit of background, a list of variants, and of course, the download."
Comment: I've very impressed with what I saw. This is a great resource for the wargamer.