TextPad - http://www.textpad.com/ - Free ware (requests for paid usage) http://download.textpad.com/download/v47/txpeng473.exe
UltraEdit - yet another free text editor http://www.ultraedit.com/ download location http://www.ultraedit.com/index.php?name=Downloads&d_op=getit&lid=1
WinRAR - good archive files manager. Limitted time tril version (?) http://www.rarlab.com/rar/wrar342.exe
Windows Support Tools from Microsoft - http://download.microsoft.com/download/d/3/8/d38066aa-4e37-4ae8-bce3-a4ce662b2024/ Starting location from http://www.microsoft.com/downloads/details.aspx?FamilyID=49AE8576-9BB9-4126-9761-BA8011FABF38&displaylang=en
PSExec (part of PSTools) - remote execution win-win. Usefull for Windows admin or having to work with multiple machines at the same time.
http://www.sysinternals.com/ntw2k/freeware/pstools.shtml
Slogger - firefox extension for logging traffic
http://www.kenschutte.com/firefoxext/
Ethereal - Network Protocol Analyzer
http://www.ethereal.com/
HTML validator extension for FireFox (based on Tidy)
http://users.skynet.be/mgueury/mozilla/