Winpcap はBSDライセンスなのか。
Winpcap:http://winpcap.polito.it/
pycap:http://pycap.sourceforge.net/
pynetlibs:http://pynetlibs.sourceforge.net/default.html
py-libpcap:http://sourceforge.net/projects/pylibpcap/
py-libpcap-win32:http://www.ghaering.de/python/unsupported/pylibpcap/
Billy the Kid:http://home.student.utwente.nl/g.v.berg/btk/