Axence NetTools
v2.1
Host monitoring with alerting and long term charts of response time & packet lost. With alerting you can set e-mail, message, sound, and tray notifications. Other features: graphical ping, fast traceroute (full trace in 1 second), lookup, port scanner, TCP/UDP service scanner, network scanner (it finds hosts, their IP/MAC, running services etc.), and full SNMP browser. It has the most highly intuitive user interface and may run in the Icon tray to continuously monitor hosts. Free and Pro versions.
Capture and Sniff Yahoo Messenge chat conversations on all computers in network,It is able to record conversations automatically in real time,And export all intercepted messages to HTML files
NetPalpus is a powerful and easy-to-use network management tool, which can discover, organize and monitor all devices on your network.
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.
Full Feature logging and traffic analysis software for Linksys WRT54G/GS routers featuring 20 different reports and graphs and much more to help you understand and manage your network traffic and security.
LANVisor allows you to see the screens of multiple computers connected to the local area network. You can use the software to see what users do on remote computers and automatically take screenshots.