Here's a collection of online utilities that you might find useful once in a while.
If you do find any problems with the programs mentioned below, please feel free to contact me.

HTML ValidationCheck any webpage for errors
Your DetailsShows what your IP address, browser and proxy are
Knowledge baseAll sorts of computer knowledge stored here
String Encode/DecodeConvert a string to and from different encodings
Squid blocked sitesSquid blocked sites
Group TrackPrivate instant messaging
Eve calculatorCelebrate every day!