Shieldwall is a set of free wagames rules for 6 – 8 figures, using a dice pool mechanism. It is short, but well done.
The Miniature Wargaming Editor
Stripping Miniatures
Here’s a good article on a variety of ways to strip your miniatures.
Fallen Trees and Bushes Stands
Here’s an article on making fallen trees and bushes terrain pieces that could be used to designate rough terrain in any game.
Making River Terrain
Here’s a short tutorial on making “wild river” terrain. The impetus for this was playing the Fords of Isen scenario, but the techniques obviously could be used for river terrain for any game.