List installed products on Windows

Get-InstalledProducts.ps1

$UninstallKey="SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Uninstall"

$reg = [Microsoft.Win32.Registry]::LocalMachine.OpenSubKey("$UninstallKey")

$products = @()

foreach ($name in $reg.GetSubKeyNames()) {
  $product = [Microsoft.Win32.Registry]::LocalMachine.OpenSubKey("$UninstallKey\$name")

  $products += $product.GetValue("DisplayName")

  $product.Dispose()
}

$reg.Dispose()

$products | sort