Overseer Network Monitor 3.0 (by Sensible Software Solutions)
Windows network/website/event log/service/disk space monitoring software.

Overseer Network Monitor 3.0 (by Sensible Software Solutions)
Windows network/website/event log/service/disk space monitoring software.

Bello Network Monitoring WinGUI 5.0.1.231 (by Paessler AG)
Monitoring for your websites and servers - easy to use and cost effective

Bello Network Monitoring WinGUI 5.3.1.587 (by Paessler AG)
Monitoring for your websites and servers - easy to use and cost effective

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

ipPulse 1.65 (by Northwest Performance Software, Inc.)
Monitor network devices and notify of problems via email, pager, web, logs

PA Server Monitor 3.2.19 (by Power Admin LLC)
Monitors event log, services, performance counters, disk space, web pages, etc.

NetStatus 2.3.1.0 (by OTO Software, Inc.)
NetStatus is a network monitoring tool with a 100% web interface.

Easy Network Service Monitor 2.14 (by Javvin Company)
Easy to use and lost cost Network and service monitoring

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

ServiceKeeper 4.7.38 (by Active+ Software)
Monitoring, Recovery and failure notification of any networked resources.

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.