Wealth of advanced Windows troubleshooting tools

http://live.sysinternals.com/

AJAX Templates

http://www.ajaxdaddy.com/

PDF Conversion Tools

http://somepdf.com/

Print posters with basic printers

Print out poster size images without the need of a large format printer

http://posterazor.sourceforge.net/

Website of interest for PC Technician

http://radified.com/index.rad

Using DD-WRT as HotSpot

This is really fun. Part I and II.

Create your own font for free

http://fontstruct.fontshop.com/

Convert the Flash video on YouTube to MP3

http://flvto.com/

Why? Sometimes a YouTube video contains great audio that you want to
hear offline from your mp3 player.

A useful add-on for Thunderbird for creating Tasks

https://addons.mozilla.org/en-US/thunderbird/addon/7125