Virtual Serial Ports Driver XP2 

Virtual Serial Ports Driver (VSPD) is a Windows device driver. Using it you can create any number of virtual serial COM ports in your system which will be virtually connected to each other via virtual null-modem cable
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IsItUp Network Monitor 

IsItUp Network Monitor is a server, website, port, and email system monitor. It monitors multiple IP devices, websites, servers and ports with alerts via email or pager. Web content check; performance stats and error log, runs as a service.
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MZL & Novatech Traffic Statistics 

MZL & Novatech TrafficStatistic shows accumulated bandwidth usage of a network interface like ethernet, DSL or PPP in tray. It generates IP traffic statistics IPDR data and can generate reports on his top bandwidth consumers cut by host and service.
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Iban 

- Want to know who is or owns an ip address or domain? - Search worldwide for interesting domains. - Hear when a line breaks down/is up. - Know why you can not reach a domain. - Solve internet problems from your desk. - New: Reports printable
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IP_NetStat 

Graphical network statistics showing open TCP/IP ports and their connections. Allows for printing or saving to a text file as well as the ability to hide connections to the local machine.
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NetworkView 

NetworkView is a compact network discovery and management tool for the Win32 platform : in a few minutes, it will discover all TCP/IP nodes and draw a full graphical map using DNS, MAC addresses, SNMP, WMI, NetBIOS and TCP Ports information.
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