Wireshark -
http://www.wireshark.org/download.html
Wireshark is the world's foremost network protocol
analyzer, and is the standard across many industries and educational
institutions.
Solegy SIP Desktop Dialler -
http://www.opensourcesip.org:8080/clearspacex/docs/DOC-1001
SIP Proxy -
http://www.teksip.com/
TekSIP is a SIP Registrar and Stateless SIP Proxy for
Windows.
X-Lite SIP Phone -
http://www.counterpath.com/x-lite.html&active=4
This is a great free softphone enabled for video and IM.
Download



