Terrain Thralls has an illustrated tutorial on making a half-timbered, two story roadhouse. The end result is beautiful, and would be useful in a wide variety of settings.
medieval
Medieval and Renaissance Flags For Download
The Krigsspil site has a huge number of medieval and renaissance flags available for downloading.
Simplus Medieval Miniaturis Rules (SMR)
Simplus Medieval Miniaturis Rules (SMR) is set of free wargames rules for battles in the medieval era.
To Cry A Joust
To Cry A Joust is a set of free wargames rules for jousting combats.
Are You Being Serfed? Wars of the Roses Rules
Are You Being Serfed? is a set of free wargames rule for the Wars of the Roses. The author notes:
I believe they will give a fast and fun game. We are going to have in the region of 40+ units, 800+ figures on the table and with possibly only 2 players they need to be.