Wireshark

Receives NetFlow packets from up to 10 NetFlow routers and to store their contents into up to 10 databases on Microsoft SQL Servers and MySQL servers.

IP Watcher monitors your public and local IP address. If your IP address changes it will send an email or SMS Text Message alert containing the new IP address. This alert also includes the computer name, local ip address and time the change occurred.

NetWorx is a free tool for measuring the speed of all kinds of network connections (modem, Ethernet, ISDN, DSL, wireless) and bandwidth usage. The program provides graphic representation of incoming and outgoing traffic, bandwidth reports and more.

Network Inventory Reporter is a Administrator solution management software that collects and reports network hardware, software, program groups, and programs for all network computers.

Nsauditor is a network security scanner that allows to audit and monitor network for possible vulnerabilities,checks methods that a hacker might use to attack it. Over 45 network tools for scanning,sniffing,enumerating and gaining access to machines.