WinDivert: Windows Packet Divert
VoIP SIP and SKINNY quality analyzer and packet / audio recording tool
terminal based packet sniffer
A network tool to control the bandwidth over your local network
A Swiss army knife for your daily Linux network plumbing
Xplico is a Network Forensic Analysis Tool (NFAT)
A minimal .NET binding over WinDivert
A java packet sniffer and forger that wraps pcap libs.
Bluetooth Low Energy (BLE) packet sniffer and transmitter
The Network Forensics Tool
...has moved to packetpeeper.org
A simple packet sniffer for local networks
Simple Multi Protocol Packet Sniffer - SMPPS