Nipper is described as '- Neat Internet Protocol Packet EditoR - is a graphical packet generation tool. With Nipper the user can easily build different kinds of packets and send them to network' and is an app. There are four alternatives to Nipper for Windows, Linux and Mac. The best Nipper alternative is Scapy, which is both free and Open Source. Other great apps like Nipper are Packet Editor, Winsock Packet Editor and packeth.
Scapy is a powerful interactive packet manipulation program. It is able to forge or decode packets of a wide number of protocols, send them on the wire, capture them, match requests and replies, and much more.
Packet Editor a free packet editing tool to debug winsock based network solutions. Added ability to control which socket the Replay Editor sends on.
WPE Pro is a packet editor. Winsock Packet Editor (WPE) Pro is a packet sniffing/editing tool which is generally used to hack multiplayer games. WPE Pro allows modification of data at TCP level. Using WPE Pro one can select a running process from the memory and modify the data se.
packeth is GUI and CLI packet generator tool for ethernet. Primary it is developed and maintained for Linux, but some ports for Windows and MAC have also be done. It allows you to create and send any possible packet or sequence of packets on the ethernet link.
