The Casting List. The Casting List is an e-mail discussion group covering all aspects of model-making, mold-making, and casting. There is also a companion web site. The Caster's News, a "spin off" of The Casting List, is an E-zine devoted to casting, molding, rapid prototyping, and model-making. The first issue is slated for June 1, 2001.

DesktopCNC.com. This a deep site with numerous tables of comparative specifications, articles and many pages dedicated to manufacturers' product lines. A lot of hard work went into this site.

Electro.Patent-Invent.com A great resource to find out about basic electrical and electronic inventions and phenomena. Also has some patent and thesis information.

FoundryOnline.com. Has links to many foundry related sites and some tutorial information about basic commercial RP processes.

NDX.com. A manufacturing portal covering: metalworking, fabrication, welding, material handling, retrofitting & rebuilding and gears. Has resources such as: article archives, new product news, manufacturing suppliers, metalworking info and industry news.

That’s an Idea. Invention and patent advice for both amateurs and professionals.