1)   MSN Protocol Analysis Tool 0.9.2
MSNProtocol Analyzer 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.

 2)   SwitchSniffer v1.4.2
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 and block user definable session like firewall.