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.

SmartSniff - SmartSniff is a packet sniffer that capture TCP/IP packets and display them as sequence of conversations between clients and servers.

tcpdump - tcpdump is a common packet analyzer that runs under the command line.

Packetyzer - Packetyzer provides a Windows user interface for the Ethereal packet capture and dissection library.

Ettercap - Ettercap is a suite for man in the middle attacks on LAN.

Appknox - Appknox is a cloud-based mobile app security solution to detect threats and vulnerabilities in the app.