Many of you use
Sysinternals tools to help you manage computing responsibilities ranging from monitoring/understanding process activity with Process Explorer to debugging Win32 code with DebugView. With over 70 utilities to choose from, Sysinternals tools cover a wide swath of computing, from the lowest levels to the highest.
For the first time, we now have a definitive guide to all of these tools:
Windows Sysinternals Administrator's Reference.