[teyc]

Powershell has a common language, common help system, common logging framework. It's a very nicely done project.

You can

    Get-Help Update-ItemProperty -Example

to get some samples.

It is introspectable, so command line completion of argument parameters just work.

I even saw web based and windows based gui that can probe any powershell command and provide a rudimentary UI with field level help.

You can even find the relevant commands e.g.

    Get-Command -Noun PSDrive

gets you all the commands that can act on a PSDrive object.

[nerdponx]

This is really useful, thanks for that. Unfortunately I can't bring myself to use Powershell because of the sheer verbosity of the command line (might as well just use Python, in my opinion), but I really like a lot of their design choices.