Scapy, the best tool for learning "Packet", is developed at http://bb.secdev.org/scapy. This repository will pull the commits from http://bb.secdev.org/scapy, some files from scapy-community, my small files, third-party extra protocols, and some scapy scripts.

• Windows: http://www.secdev.org/projects/scapy/doc/installation.html#windows
• Linux: See (How to use)
• Mac OS X: http://juhalaaksonen.com/blog/2013/12/11/installing-scapy-for-mac-os-x/
• BSD: ?

git clone --recurse-submodules https://github.com/syakesaba/scapy.git
cd scapy
./run_scapy

scapy - GPL version 2 (See "LICENSE")
others - written in file. check author and read files(see file source).