NETWatch 

NetWatch is a program that keeps IT staff informed about their network infrastructure - wherever they are! Designed for Microsoft Windows, Novell NetWare, UNIX and a range of Internet services such as web servers, NetWatch 2 monitors them all.
network internet web smtp mail ftp netware windows active directory nds netware monitor manage

NetListener 

Watchdog for your LAN, to check if your PC's living or not. And start some Actions after a Status-Change, like Batch-files with "net send" or commands to send Fax/SMS (external Application) to the Maintenance Personal.
watchdog network netevents