Alchemy Network Monitor - программа предназначена для мониторинга функционирования LAN и серверов. При обнаружении каких-либо проблем или неисправностей генерируется сообщение для системного администратора, которое может быть передано по e-mail, телефону (SMS), пейджеру или ICQ. Ведется детальный лог-файл.

It is estimate that network failures cost 3-5 billion dollars to companies each year. In fact, most surveys show that an average network administrator reports 3 to 15 serious network malfunctions annually. Yet most of these problems could be easily avoided, if the administrator had proper network monitoring software installed. Alchemy Network Monitor is a network monitoring tool that continuously monitors network server availability and performance, and alerts the network administrator in the event of network errors BEFORE these problems get seriously out of hand.
Homepage: http://www.mishelpers.com/network_monitor/index.html