A collection of moderately low level high power diagnostic utilities. 
PC / Intel cpu biased but other stuff as well

YMMV / use at own risk / I've no idea if all these are safe but would 
be immensely surprised if you couldn't blow away your system with some 
of them given enough luck and skill.

        http://www.onlineconferencingsystems.com/diagnostics/


            Russell

Two samples:

Process Explorer for Windows
Ever wondered which program has a particular file or directory open? 
Now you can find out. Process Explorer shows you information about 
which handles and DLLs processes have opened or loaded. The Process 
Explorer display consists of two sub-windows. The top window always 
shows a list of the currently active processes, including the names of 
their owning accounts, whereas the information displayed in the bottom 
window depends on the mode that Process Explorer is in: if it is in 
handle mode you'll see the handles that the process selected in the 
top window has opened; if Process Explorer is in DLL mode you'll see 
the DLLs and memory-mapped files that the process has loaded. Process 
Explorer also has a powerful search capability that will quickly show 
you which processes have particular handles opened or DLLs loaded. The 
unique capabilities of Process Explorer make it useful for tracking 
down DLL-version problems or handle leaks, and provide insight into 
the way Windows and applications work.


Windows XP Diagnostic Utilities
Frees-up system resources, performs diagnostic tests and helps to 
adjust system performance.  These utilities are for advanced users 
only! 

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