Essential NetTools is a useful tool for diagnosing networks and monitoring your computer's network connections. It's a Swiss Army knife for everyone interested in a set of powerful network tools for everyday use.
SmartWhois is a network information utility that allows you to find out all available information about an IP address, host name, or domain. The program can retrieve information from more than 60 servers all over the world
CommView for WiFi is an l edition of CommView designed for capturing and analyzing network packets on wireless 802.11a/b/g networks. With CommView you can see the list of network connections and vital IP statistics and examine individual packets.