Weight of Fire is a set of free wargames rules for horse and musket era battles (1740 – 1790). The rules are designed for 25mm – 30mm figures on a 1:25 scale.
Making Modular Cave Tiles For D&D
This tutorial shows how to make modular cave tiles that also serve as hills for wilderness games.
Making Flocked Magnetic Unit Stands
The WAB Corner Blog has a nice post on making terrained magnetic bases to hold four figures based individually on washers.
From Lexington To Yorktown AWI Rules
From Lexington To Yorktown is a set of free wargames rules for American Revolution battles. Each model equals 10 infantry.