Free Port Scanner is a small and fast port scanner for the Win32 platform.
License: Freeware
OS Support: WinNT 3.x,WinNT 4.x,Windows2000,WinXP,Windows2003,Win Vista

Pingotron allows managing devices connected to a local network.
License: Shareware
OS Support: Win98,WinXP,Windows2000,Windows2003,

Pingotron Pro allows managing devices connected to a local network.
License: Shareware
OS Support: Win98,WinXP,Windows2000,Windows2003,

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

Isolate faults and simplify processing of diagnostic data.
License: Shareware
OS Support: Win98,WinME,WinNT 4.x,Windows2000,WinXP,Windows2003,Win Vista

Quickly find out what web server software a website is using.
License: Shareware
OS Support: Win95,Win98,WinME,WinNT 3.x,WinNT 4.x,WinXP,Windows2000,Windows2003,Windows Tablet PC Edition 2005,Windows Media Center Edition 2005,Win Vista

Ping all devices on your network even if they have a firewall.
License: Shareware
OS Support: WinXP,Windows2000,Windows2003,Windows Tablet PC Edition 2005,Windows Media Center Edition 2005,Win Vista