When Servers Alive detects a down condition, it can respond with a wide array of notifications and alerts, including sending an e-mail (SMTP) saying what is down, paging you with a numeric or alphanumeric warning, executing a program, playing a sound, creating a web or WAP page, and restarting an NT service.

LanTopolog 2
Provides automatic physical network topology discovery, network map visualization, detailed and searchable physical network topology map, monitoring device's state in real-time, network traffic monitoring, web browser-based access

MC3 Cyber Cafe Software Home Edition
Download free MC3 cyber cafe software from Mouse Click. It can perform remote PC monitoring such as lock screen, logoff, restart, shutdown or send warning message to remote PCs via the network.

Syslog Watcher Pro Edition
Gather syslog data from network appliances and workstations. Syslog Watcher Pro Edition collects syslog information from network devices via UDP and TCP protocols, and works in IPv4 and IPv6 networks, records, stores, organizes and displays syslogs.

NetStatus Professional
NetStatus Pro is a monitoring application designed to monitor anywhere from 1 to 250 servers or devices on a network. Tests include HTTP, FTP, Telnet, Ping, Disk Space, Event Log, File Exists, NT Service Status, Performance Monitor and more.

Network Inventory Software
Network Inventory Advisor covers all network inventory needs and features software, hardware, licenses audit tools for automated inventory of networks with 20 or more than 1000 nodes