Useful Links

Web Tools
http://www.tracert.com - Trace Route and Ping Tools
http://www.speedguide.net/ - Test your connection speed
http://www.netsol.com/en_US/ - Register or look up domain names
http://www.thawte.com/ - Secure certificates
http://www.tucows.com/ - Shareware
http://www.metaspy.com/ - View Search Queries in real time (Warning: Some may be x rated.)
http://www.arin.net/ - Registry of Internet numbers

Development
http://msdn.microsoft.com - Microsoft Developer's Network
http://javascript.internet.com/ - Javascript
http://www.flashkit.com/ - Everything Flash