MSN Protocol Analyzer
MSNProtocol Analyzer(MSNPAnalyzer) is a network utility that can monitor (or capture, monitor) the sessions of MSN Protocol. If you use this program in conbination with SwitchSniffer program, you can capture and see all the MSNP sessions including conversations and MSN commands. ... If MSNPAnalyzer is used in conbination with SwitchSniffer program, You can capture all see all the MSN protocols and conversations. ... [Company Managers] ? ... Want to know what their children are most concerned? ... want to see the MSN protocol including MSN commands to develope the products related to MSN.
http://nextsecurity.softahead.com/downloads/msnpanal/MSNPAnalyzer.zip - 1Mb - Download - Screenshot

SwitchSniffer
1. Overview SwitchSniffer is a program that can scan your switched LAN for up hosts and can reroute and collect all packets without the target users' recognition. It can also detect the ? arpspoofer? program running on the network and block user definable sessions like firewall. ... It can cure arp-cache poisoning. ... 2 Benefits: -. ... It has a feature which filters or blocks sessions, local hosts and remote hosts. ... It can detect which computer is running an arpspoofer program on the local network.
http://www.nextsecurity.net/downloads/switchsniffer/SwitchSniffer.zip - 3Mb - Download - Screenshot