Windows Systernals - Free

Whether you’re an IT Pro or a developer, you’ll find Sysinternals utilities to help you manage, troubleshoot and diagnose your Windows systems and applications. Dr. Mark Russinovich is a Technical Fellow working in the Platform and Services division. Russinovich is a widely recognized expert in Windows operating system internals, and operating architecture and design. His discovery of a rootkit on popular Sony audio CDs led to industry reforms in the area of computer privacy. (More Here...)

Cabling: The Complete Guide to Network Wiring, 3rd Edition

I contributed to this book and it is one of the best. Actually, there probably aren't that many books on the subject. Written by David Barnett, David Groth and Jim McBee.

 Microsoft PowerToys for Windows XP - Free

PowerToys add fun and functionality to the Windows experience. What are they? PowerToys are additional programs that developers work on after a product has been released. Progams such as:
 
Image Resizer -This PowerToy enables you to resize one or many image files with a right-click.
 
Tweak UI - This PowerToy gives you access to system settings that are not exposed in the Windows XP default user interface, including mouse settings, Explorer settings, taskbar settings, and more.
 
Color Control Panel Applet - Professional-level photographers and designers know that getting consistent, accurate color from file to screen to print and beyond is a requirement for great results. This new tool helps you manage Windows color settings in one place. (More Here...)