IP monitor

IPMonitor is a sophisticated network monitoring solution that allows
network administrators, webmasters, and Internet service providers to
monitor any networked device on the Internet, corporate intranet, or TCP/IP LAN and receive alerts immediately via audible alarm, message,
e-mail, or third-party software when a connection fails. It is a powerful personal monitoring product delivering low cost, simplicity of operation, and round-the-clock coverage.

http://ipmonitor.tsarfin.com/downloads/ipmonitor.zip