Free Port Monitor
This is a free server and network ports monitoring software for Windows system, Free Port Monitor can monitor many hosts port status at one time, can monitor and test all local network computers or remote hosts and servers, program can support many hosts in the same time.
This free network tool will notice you when your website and network server becomes unavailable at first time, program can monitor and test for individual sites, applications, and networks.
Please Note: this latest program don't support Email alert now. It can run with Windows system at startup.
Free Port Monitor is one useful network utility for all network administrators and webmasters; they can use this free tool to keep one eye on their servers, it can work with any arbitrary services running on TCP/IP. Program can run with Windows system at startup, and program can run in the background and only show one tray icon in the taskbar, you can double click taskbar icon to restore the main program window.