Army Men Combat is a set of one page miniature wargames rules. It’s designed for those ubiquitious plastic army men, but in truth could be used for anything.
Celtic Skirmish Game
From Warspawn Games: Celtic Skirmish, a combination miniatures / board game.
Medieval Castle Siege Rules
Junior General has a simple set of Medieval Castle siege rules. The site also has links to appropriate paper figures, castle models and siege equipment.
Arthuriana Resources On King Arthur
For gamers interested in the historical King Arthur, Arthuriana offers an interesting site.
One Page Little Wars
From the One Page Rules guys comes a game based on HG Wells’ seminal Little Wars: One Page Little Wars