The Shadowed Realm site has an article on Richard the Lionheart and Saladin, which provides good background for anyone thinking of starting a Crusades gaming project.
The Miniature Wargaming Editor
Chain of Command: The Horus Heresy
Chain of Command: The Horus Heresy is a modification of Two Fat Lardies’ Chain of Command Rules for the Warhammer 40K Universe.
Battle of Marignano Board Game
The Battle of Marigano is a free board game about a 1515 battle between the French and Swiss. To print it, downloaad the two image files in the middle of the page.
Modeling Alien Plants
Terragenesis has a nice article with ideas for modeling alien plants.
Covering Fire! One Page Rules
Covering Fire! is a set of free wargames rules on a single page. It is designed for platoon level actions and uses no measuring tape or turn structure.