Get installed softwrae on a PC as a text file.

List-InstalledSoftware

Get-WmiObject Win32_Product | Sort-Object Vendor, Name | Format-Table Vendor, Name, Version -groupBy Vendor | Out-File C:\Temp\Test.txt

# Note, can also use 
# Get-ItemProperty HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall\* | Sort-Object Publisher, DisplayName | Format-Table DisplayName, Publisher, InstallDate | Out-File C:\Temp\Installed.txt

# See 
# http://blogs.technet.com/b/heyscriptingguy/archive/2011/11/13/use-powershell-to-quickly-find-installed-software.aspx
# and 
# http://blogs.technet.com/b/heyscriptingguy/archive/2013/11/15/use-powershell-to-find-installed-software.aspx
# for details