iCrank.com - well-organized
database of mechanical engineering resources
MatWeb
- material database, thousands of materials, great search facility,
choice of units
Eng-Links -
engineering calculators, reference materials, links, by Steve Henderson
ThomasNet
- as complete a resource of distributors, manufacturers, services as
we have ever seen, powered by the company that wrote the book, Thomas
Register. Includes links to CAD drawings.
efunda - engineering fundamentals, equations, materials, units and more