WiFinspect is a free computer and network security toolkit designed to inspect and audit a user's WiFi network. The app comes loaded with a variety of tools, from the ability to retrieve basic network information, to a UPnP device scanner, a port scanner, a network sniffer, and more. The PCI DSS menu allows you to scan for network access points, check for vulnerabilities, and test for default passwords. While certainly overkill for an everyday user, it's a great compliment to a network-savvy user's own software tools.