Edinburgh Engineering Virtual Library

 http://www.eevl.ac.uk/ A guide to engineering, mathematics and computing information on the internet.

Eng-Tips

 http://www.eng-tips.com/ Provides links to technical support forums for a range of engineering professions.

Engineers4engineers

 http://www.engineers4engineers.co.uk/ Technical Information for the Professional Engineer (Electronic, Electrical, Consulting, Mechanical, and Software). Links to engineering information and advertisements by Experts in various engineering fields. Help build the largest human-edited directory on the web.