Alchemy Network Monitor monitors your network servers and business-critical applications availability and performance and immediately alerts you if a server gets out of order. Alchemy Network Monitor can also perform certain actions (e.g. launch an external application or execute an SQL query) when a server stops responding to the programs requests and maintain a detailed server monitoring log.

LanTopolog
Provides automatic physical network topology discovery, network map visualization, detailed and searchable physical network topology map, monitoring device's state in real-time, ability to auto-discovery new devices, web browser-based access

Alchemy Network Monitor
Alchemy Network Monitor monitors your network servers and business-critical applications availability and performance and immediately alerts you if a server gets out of order.

IsItUp
Taro Software's IsItUp - When you need to know the status of your network. IsItUp monitors network IP devices, email servers, & websites around the clock and alerts you via email/pager when it goes down and comes back up! Performance Statistics kept.

10-Strike LANState
LANState is a network monitoring program which allows to see your network's state in visual form at any time. It monitors hosts, shared resources, traffic, gets MAC-addresses, scans TCP and UDP ports, gets info on remote PC, and notifies on events.

ActiveXperts Server Monitor
ActiveXperts Server Monitor monitors your computers and devices. Monitors Windows, UNIX, Linux and Novell. Monitors Active Directory, web/mail servers, file servers, databases, disks, processes, snmp, tcp, temperature and more.