Websites for general engineering resources
American Design Drafting Association
American Design Drafting Association (ADDA) is an organization dedicated to training and education in the field of drafting and graphic arts for mechanical, architectural, civil engineering and other technical fields.
ASME
Founded as the American Society of Mechanical Engineers, now known simply as ASME.
ASSIST – Quick Search
MIL Standards.
ASTM International
Founded as American Society for Testing and Materials, now known simply as ASTM International.
efunda
Design standards.
Engineers Edge
Great site for engineering research and calculators.
ISO.org
ISO international standards.
MatWeb
Material Property Data website.
Mechanical Engineering books (Amazon.com)
Mechanical Engineering book list.
National Society of Professional Engineers
PEs come here.
SAE International
Founded as Society of Automobile Engineers, now known as SAE International.
Society of Plastics Engineers
Society that establishes plastics specifications, most commonly known for their finish standard.
ThomasNet
Thomas Register online.
Wire Size Calculator
electrician2.com wire (conductor) size calculator.