Anvilfire 
Blacksmiths' and metal workers' reference. Questions answered daily by the Guru. Meet and chat with other smiths at the Slack Tub Pub. Buy, sell, and trade at the Virtual Hammer-In.
http://www.anvilfire.com/The Metalworking FAQ/Compendium
Based on the FAQ and other information for the UseNet newsgroup rec.crafts.metalworking.
http://w3.uwyo.edu/~metal/
The Hawley Collection
An edge-tools and cutlery collection housed at the University of Sheffield, in the UK, and a description of the project.
http://www.shef.ac.uk/hawley/
18th Century Trade Secrets Relative to Metals
Detailed instructions of the methods used by metal workers in the 18th century.
http://www.old-crafts.com/metals/secrets_relative_to_metals.htm
Foundry 101
Hobby metal casting. Learn to cast aluminum and brass in sand molds. Includes step by step instructions with pictures.
http://www.foundry101.com/
