NetStumbler - Official source of information about Netstumbler.
Debookee - Debookee is the simplest & most powerful network traffic analyzer for macOS.
Wireshark - Wireshark is a network protocol analyzer for Unix and Windows. It lets you capture and interactively browse the traffic running on a computer network.
inSSIDer - inSSIDer Essential makes it easy to maintain small business WiFi.
Ettercap - Ettercap is a suite for man in the middle attacks on LAN.
Paessler PRTG - An advanced network monitoring solution to monitor network up/downtime, traffic and usage.