Sysinternals Live is a service that enables you to execute Sysinternals tools directly from the Web without hunting for and manually downloading them. Simply enter a tool’s Sysinternals Live path into Windows Explorer or a command prompt as http://live.sysinternals.com/<toolname> or \\live.sysinternals.com\tools\<toolname>.
You can view the entire Sysinternals Live tools directory in a browser at http://live.sysinternals.com."
pretty cool of them imo.
Also, the http page there at the end provides a nice easy portal to download all their exe's at once ;)