packet sniffer

enables decoding and low level analysis of ISO/DVB transport streams.

powerful utility for extraction of ICQ-messages from the network stream.

Packet analyzer with HTTP file capture and a neat Graphical Packets Mode. Free.

Sniffer80 is simple web sniffer and packet analyzer based on .NET technology.

Detect and prevent emerging network intrusions with real-time traffic analysis and packet IP logging.

Perform port forwarding, packet routing, cloning, and many other networking functions.

Switch on a computer from a second one by sending a "Magic Packet".

hping is a command-line oriented TCP/IP packet assembler/analyzer

Packetyzer provides a Windows user interface for the well known Ethereal packet.

oriented TCP/IP packet assembler/analyzer