1)   Axence NetVision 2.0
NetVision helps you to make sure that all services, mail, web, and database servers are always up and running. It automatically discovers and monitors your computers and SNMP devices while additionally providing alerts and performance reports.

 2)   Axence NetTools 3.0
Comprehensive set of network tools: NetWatch - network monitoring & alerting, WinTools lists exhaustive system info from Windows computers, port/network scanner, NetStat lists local connections, TCP/IP workshop, ping, trace, lookup, SNMP browser

 3)   Free Axence NetTools 3.2
A comprehensive set of FREE network tools: Port/Network Scanner finds all the nodes in a network; NetStat lists local connections; Service & Port Scanner checks for all open ports and running; TCP/IP workshop, NetCheck, ping, trace, lookup, bandwidth

 4)   Free IP Tools 4.2
Free IP Tools is a convenient way to keep all important network utilities in one place. Twelve essential network tools inside a single user-friendly application. Troubleshoot network problems with this free collection!