Big List of Mundane Items

Dragonlady's Open Air Bazaar

Tavern Menu

Historical Coinage

How Much Money can a Container Hold?

Investments in the Middle Ages

Currency Descriptions: A sample on how to describe coins better than “gold, silver and copper piece,” from my Zioth campaign.

Magic Items: AD&D 2nd Edition magic items from the Fidonet Compendium.

Magic Items: Magic items I created for D&D 3.x. Most of these are easily adapted to other game systems.

Building an Armory

Making Iron Swords

Poisons of the Realm

Real Poisons in D&D

The Guide to Herbs for RPGs