I am finally getting around to installing Windows 7 on my laptop. Before I wipe everything I wanted to have an idea of what I currently have installed. So, I put together a little PowerShell script:

Get-WMIObject Win32_product | sort-object vendor | format-table name, version, vendor, caption -autosize | out-file installed.txt -width 250

It is a pretty simple example. It uses the Win32_product WMI class to get a list of installed application. I then sort by vendor, format as a table, and output to a text file. As I said, pretty simple.