Awesome

arpspoof

Python clone of arpspoof that can poison hosts via arp-requests as well as arp-replies

This was inspired primarily by Zorinaq's blog post: http://blog.zorinaq.com/?e=6

and the 'Arp Reloaded' talk by Jesse "x30n" D'Aguanno: https://www.youtube.com/watch?v=jt61Y3MEW2o