IPSentry Network Monitoring Suite 5.0.20 (by RGE, Inc.)
Monitor your network and its devices to receive notifications for problems.

IPSentry Network Monitoring Suite 4.7.0 (by RGE, Inc.)
Monitor your network and its devices to receive notifications for problems.

IPSentry Network Monitoring Suite 4.7.0 (by RGE, Inc.)
Monitor your network and its devices to receive notifications for problems.

IPSentry Network Monitoring Suite 5.0.20 (by RGE, Inc.)
Monitor your network and its devices to receive notifications for problems.

Alchemy Network Monitor PRO 8.0 (by M.I.S.Helpers)
Monitors your LAN servers availability and performance, alerts on failures

Alchemy Network Monitor 8.0 (by M.I.S.Helpers)
Monitors your LAN servers availability and performance, alerts on failures

NetStatus Professional 2.4.1.0 (by OTO Software, Inc.)
NetStatus Pro is a network monitoring tool with a 100% web interface.

EyeOnSite 1.7.2 (by Virdi Software)
Keep an eye on your servers to make sure they are accessible to your visitors.

IsItUp Network Monitor 4.9.8.1 (by Taro Software Inc.)
IsItUp network monitor for servers, ports, websites, email w/ alerts & graphs

DNS Watcher 1.2 (by SB-Software)
keep watch on their DNS entries and ensure the servers are responding correctly

Network Device Explorer 1.1 (by Alchemy Lab)
Manage network devices (routers, switches, modems, etc) remotely from your PC

GFI Network Server Monitor 7 (by GFI Software)
Monitors your network & servers for failures and fixes them automatically.

Netoscope 1.6 (by Basta Computing, Inc.)
Netoscope: Internet server monitor.

The Dude 1.1 (by MikroTik)
The Dude will layout your network on a map and will monitor services of devices

Sniff-em Packet sniffer 1.12 (by YASC LTD)
Sniff'em 1.12 is a Windows based allround Packet sniffer and Network analyzer.

SNMPTest 1.03 (by Noel Danjou)
Query and monitor any SNMP-compatible device

MailMonitor 1.6.3 (by DigiArch.org)
If you have mail problems, MailMonitor shows you what's going on at port level.