Process Explorer v11.0
"Process Explorer is an advanced process management utility that picks up where Task Manager leaves off. It will show you detailed information about a process including its icon, command-line, full image path, memory statistics, user account, security attributes, and more. When you zoom in on a particular process you can list the DLLs it has loaded or the operating system resource handles it has open. A search capability enables you to track down a process that has a resource opened, such as a file, directory or Registry key, or to view the list of processes that have a DLL 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.
Process Explorer does not require administrative privileges to run and works on Windows 9x/Me, Windows NT 4.0, Windows 2000, Windows XP, Server 2003, Windows Vista, Windows Server 2008 and on the x64 version of 64-bit Windows XP, Windows Vista, Windows Server 2003, and Windows Server 2008."
Check out the What's new in V11.0 and download it from here.
Windows administrators often need to know what kind of accesses specific users or groups have to resources including files, directories, Registry keys, global objects and Windows services. AccessChk quickly answers these questions with an intuitive interface and output. AccessChk is a console program.
Check the details about AccessChk v4.02 here.
UPDATE : 12Sept07: ProcessExplorer v11.01. Fixes a bug in file save and idle thread display.