Portinator is a Windows command line utility to monitor local network port usage for changes. By setting a baseline and running Portinator at various intervals, the user can be notified by email or view a log file of any changes to network port usage on that machine. Portinator has several options to aid in reducing noisy emails. Portinator uses md5 checksums to help in identifying/monitoring applications using ports (can be useful in identifying .exe changes such as trojans).....(free).....