PSCX is a extension for Power Shell (previously named Monad). It contains useful set of additional cmdlets, providers, aliases, filters, functions and scripts, which are developed by professional from all over the world. It's free, download it here.
After running the setup programm, you will notice, that new install option is avaible. Shared profile. It's basicly alot of new filters, script, etc. Now, when you install the PSCX and want to use all new cmdlets, they maybe wont work (if you didn't check Use shared profile...).
If they dont appear or you get a message like this Cannot get help for topic..., then you must install them with this command Add-PSSnapin Pscx ( open PowerShell and write this command, then press enter ) or put it in the Profile.ps1 (if you have a custom profile file) - i explained it, how to create your own Profile file and put your aliases in it.
Some of new cmdlets (usefull ones) are listed below:
The option, that put smile on my face, is a choice in context menu ( example: right mouse click in windows explorer ) with name Open PowerShell here...
Happy coding and discovering the true power of PowerShell.