Powershell has a common language, common help system, common logging framework. It's a very nicely done project. You can Get-Help Update-ItemProperty -Exa

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.