Wireless Network Watcher - scans your wireless network and displays the list of all computers and devices that are currently connected to your network.
TCPView - TCPView is a Windows program that will show you detailed listings of all TCP and UDP endpoints on...
Elcomsoft Wireless Security Auditor - Elcomsoft Wireless Security Auditor is software that is used to administer the security of your wireless Network.
Fping (open source) - fping is a program to send ICMP echo probes to network hosts, similar to ping, but much better performing when pinging multiple hosts.
WifiInfoView - Scans wireless networks in your area and displays extensive information, including: SSID, MAC Address, PHY Type (802.11g or 802.11n), RSSI, Signal Quality, Frequency, Channel Number, and more...
Open Nettest - Open Nettest is a platform for collecting, processing and visualizing data related QoS and QoE.