Windows
Hack can upgrade XP Home to XP Pro Lite(4 views)
I haven't tried it myself, but it looks like useful information. Remote Desktop FTW!
Startup List(69 views)
A list describing all the junk Windows is running in the background.
Task List Programs(36 views)
Acrobat Reader Utilities
Adobe Reader SpeedUp(21 views)
Eliminates plugins you don't need to make AR load up a million times faster. GREAT utility.
Anti-Virus
HouseCall - Free online virus scanner(28 views)
Wow. This is too damn cool! A free ActiveX-based virus scanner.
Demo Creation
DebugMode's Wink(13 views)
Nuts & Bolts
PDF / PDF Utilities
I hate PDF files. :(
ConcatPDF(18 views)
PDF concatenation / encryption / extraction
PDF Blender(18 views)
A utility that allows you to merge multiple PDFs into one. It even preserves bookmarks.
PDFCreator (sourceforge)(21 views)
Security
Microsoft Security Bulletins(16 views)
Windows XP Security Checklist(20 views)
Themes
Tips
101 Tips and Tweaks for Windows XP(19 views)
How to develop code as a non-admin(21 views)
How to run windows in restricted mode with admin rights a link away - neat stuff!
Kellys Korner - Troubleshooting and Tweaks for Windows XP(21 views)
This is some pretty neat stuff!z
Utilities
http://www.epsilonsquared.com/(19 views)
Home of InstallWatch + InstallRite
BHOCaptor - control the IE Browser Helper Objects(21 views)
Scott Hanselman's 2005 Ultimate Developer and Power Users Tool List(5 views)
You have to visit this link. Awesome stuff.
Shell Extension City(26 views)
Snippy(6 views)
Snippy's rad! Makes grabbing quick screenshots a snap. Highly recommended.
ThumbView(13 views)
XPCREATE(17 views)
Utility that combines an original Win XP distro and updates to produce an up-to-date installation CD