Electronic Engineers Master
- http://www.eem.com/
- An online edition of EEM- catalog of electronic components, equipment and services with links to the manufacturers as well as reference designs and application materials. Requires registration.
Embedded Cookbook
- http://embeddedcookbook.com/
- A community for electronic developers and the tools to share information about electronic parts. A list of available datasheets and a forum.
IC Master
- http://www.icmaster.com/
- Electronic components search, datasheets, inventory levels of distributors and side-by-side part comparisons. Requires registration (free).