Wirehark

I was hoping that one of the apps under development is a Wireshark portable application. Wireshark formerly ethereal is a network-capturing program, which allows you to examine real-time traffic and create complex filters.

I realize this would be hard or near impossible if, promiscuous mode was needed since winpcap installs services onto windows. However, I was hoping otherwise that Wireshark would work fine from a USB flash drive.

http://www.wireshark.org/