packet

Packet Player is a replay tool for open and playback packet trace file.

Packet Builder is useful tool used for creating custom network packets.

Winsock Packet Editor (WPE) Pro is a packet sniffing / editing tool

It allows to check whether the target machine recieve the packet.

Send a magic packet to turn computers on remotely.

It is a native Mac OS X implementation of a network protocol analyzer.

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

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

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.