Port Scanner Websites
nmap.org
Nmap Free Security Scanner, Port Scanner, & Network Exploration Tool. Download open source software for Linux, Windows, UNIX, FreeBSD, etc.
34,335 
$ 390,960.00
advanced-ip-scanner.com
Advanced IP Scanner shows all network devices, gives you access to shared folders, and can even remotely switch computers off. Download it Free.
40,593 $ 330,480.00
angryip.org
The original IP scanner for Windows, Max and Linux. Fast, friendly, extensible, free and open-source. Scans addresses and ports in any range and exports results in many formats.
77,246 $ 173,520.00