Wraps 'netsh wlan show networks' to print out the available wifi networks.

wifi-network-shower.ps1

$procInfo = New-Object -TypeName "System.Diagnostics.ProcessStartInfo"
$procInfo.UseShellExecute = 0
$procInfo.Filename = "netsh"
$procInfo.Arguments = "wlan show networks mode=bssid"
$procInfo.CreateNoWIndow = 1
$procInfo.RedirectStandardOutput = 1

$proc = [System.Diagnostics.Process]::Start($procInfo)
#$proc.WaitForExit()

$stdout = $proc.StandardOutput
$output = ""
while($stdout.EndOfStream -eq 0)
{
    $output += $stdout.ReadLine()
}

$networks = $output | Select-String -AllMatches -Pattern "SSID \d : (?<ssid>.+?\W).+?Authentication.+?: (?<auth>(Open|WPA2-Personal|)).+?Signal.+?: (?<signal>.+?%)"

foreach($match in $networks.Matches)
{
    $network = $match.Groups["ssid"].Value
    $auth = $match.Groups["auth"].Value
    $signal = $match.Groups["signal"].Value
    write-output $network
    write-output $auth
    write-output $signal
    write-output "-----"
}