Wireshark is an open source network sniffing utility to analyze network traffic.

tcpdump uses the libpcap library to capture packets.

NetStumbler (Network Stumbler) is a tool for Windows that facilitates detection of Wireless LANs using the 802.11b, 802.11a and 802.11g WLAN standards.

Vistumbler is open source WiFi scanner for windows.

Intercepter-NG is a multifunctional network toolkit for various types to recover interesting data from the network stream and perform different kinds of MiTM …

GlassWire free firewall software and network monitor can detect threats other miss.

NirLauncher is a package of more than 200 portable freeware utilities for Windows.

KisMAC is a wireless network discovery tool for Mac OS X.

Ettercap is a comprehensive suite for man in the middle attacks.

apptalk.ninja is a mobile app monitoring software.