Windows Sysinternals tools13 Jun 2008
The Windows Sysinternals team create a superb suite of system administration utilities which you would normally download and install onto your local machine.
This suite of tools includes a replacement for the windows task manager called Process Explorer which also helps debug file and registry operations.
While this suite of tools is incredibly useful as it is they have now released online versions of them at http://live.sysinternals.com/ meaning that you can simply point your browser to that link and run any of the tools without installing it locally.
The main advantage here is that you don't have to keep updated as they release new versions.
I guess this is another example of computing in the cloud!