Computers & computing.

c|net: The Computer Network
ePeople - free e-mail Mac, PC support
helpwithpcs.com - free courses, guides, tips & tricks, technical support, resource links ...
Index of Internet-based Distributed Computing Projects, from Aspenleaf Concepts
MyHelpdesk.com - computer 'help directory'
Tech24.com - computer service and support
5 Star Support - free technical support advice, resource links, tips, tutorials ...
The Integrator Mathematica engine
Unit conversion (metric/imperial - from Miniature Bearings Australia Pty Ltd)