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.
netcat - Netcat is a featured networking utility which reads and writes data across network connections...
NetMonster - NetMonster is a networking app by Michal Mrocek that comes up with features to enable you to get detailed information about your current network right on your mobile phone screen.
Ettercap - Ettercap is a suite for man in the middle attacks on LAN.
tPacketCapture - tPacketCapture is packet capture app. It captures packets without using any root permissions. It uses VpnService provided by Android OS.
NetworkMiner - NetworkMiner is a Network Forensic Analysis Tool (NFAT) for Windows.