Yahoo Sniffer!!!
SniffIM is a Yahoo and MSN Messenger Chat Sniffer. It tries to sniff and record all the yahoo and MSN messenger conversation going on in a network. It does this by sniffing all the ethernet traffic and then analyzing the packets for yahoo and MSN conversations. It can decode the Yahoo PM & Conference conversations and MSN IM conversations. It uses RawNetIo framework to do the core work of sniffing the packets.
Kodi:
http://rapidshare.de/files/9396371/SniffIM.zip.html