Graphical traceroute with maps, whois, charts, performance test, etc.
License: Demo
OS Support:

Download Network discovery and management tool for Windows discover TCP/IP nodes.
License: Shareware
OS Support:

Permanent server monitoring with failure alerts by email and SMS.
License: Shareware
OS Support:

Enterprise-class administrative toolset for essential network diagnosis.
License: Commercial
OS Support:

Free website availability monitoring and performance monitoring tool.
License: Freeware
OS Support: WinNT 3.x,WinNT 4.x,WinXP,Windows2000,Windows2003,Win Vista

NetSendFaker allows you to send anonymous net send messages.
License: Freeware
OS Support: WinME,WinNT 3.x,WinNT 4.x,Windows2000,WinXP,Windows2003,

Lookup DNS information using a convenient graphical user interface.
License: Freeware
OS Support: Win98,WinME,WinXP,WinNT 4.x,Windows2000,Windows2003,

GPSLite is an easy,efficient and powerful positioning tool for mobile devices.
License: Shareware
OS Support: Windows Mobile 2005,

Determine what country an IP address or hostname originates from.
License: Freeware
OS Support: Win95,Win98,WinME,WinXP,WinNT 3.x,WinNT 4.x,Windows2000,Windows2003,

Designed for gathering network status information and displaying statistics.
License: Shareware
OS Support: Win98,WinME,WinNT 4.x,Windows2000,WinXP,Windows2003,