Windows PowerShell

Apart from having a crap name, this is quite some tool [link].
Eg: I can add a registry value like this:
new-itemproperty registry::\HKEY_LOCAL_MACHINE\Software\CDS -name test -type string -value "monkey"
Brilliant!
Or I can stop the service that I'm developing without having to remember it's stupid name:
gsv ePIMS* | Stop-Service
Astounding.
There's a steep learning curve, and the WMI stuff is huge, but I think it's coding to be worth the effort.
(oooh, and just to clean up: rp registry::\HKEY_LOCAL_MACHINE\Software\CDS -name test)