The History Channel has an online, flash game about African Exploration. You roll dice (virtually), and try to accumulate miles and supplies, and avoid hazards. Its fun, and I can see a way to turn this into a neat miniatures game … I’m sure my friend Bob from Ann Arbor could pull it off.
Shot and Sail Napoleonic Naval Rules
The prolific Jim Wallman offers a set of free wargames rules for Napoleonic Warfare called Shot and Sail. In addition to the pdf fo the rules, you’ll need the zipped graphics of ship cards.
Gaming the Reconquista Information Pages
Here are a set of useful pages with information on gaming the Reconquista.
Classic Battletech Rules
Classic Battletech is a free 24 page set of rules for playing the original game of giant robots on hex maps.
A Cast of Thousands Miniatures Rules
A Cast of Thousands is not so much a set of miniatures rules as a rules mechanic. It’s designed to allow you to play “cinematic games” where you set your own level of risk-and-reward.