Useful standards web links evaluated and selected by a network of subject specialists are listed below:

American National Standards Institution (ANSI)
Coordinates the development and use of voluntary consensus standards in the US

American Society for Testing and Materials (ASTM)
Voluntary standards development organisation. Source for technical standards for materials, products, systems and services

British Standards Institution (BSI)
Standards and quality services organisation

ILI Worldwide Standards Database
Requires registration able to search for worldwide standards by title or number

International Organisation for Standardisation (ISO)
A network of the national standards institutes of 157 countries