A Swiss army knife for your daily Linux network plumbing
VoIP SIP and SKINNY quality analyzer and packet / audio recording tool
WinDivert: Windows Packet Divert
Xplico is a Network Forensic Analysis Tool (NFAT)
Bluetooth Low Energy (BLE) packet sniffer and transmitter
...has moved to packetpeeper.org
A simple packet sniffer for local networks
Simple Multi Protocol Packet Sniffer - SMPPS