PA Storage Monitor Pro 3.2.19 (by Power Admin LLC)
Monitors server volumes, generates reports and alert notifications

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

PA Server Monitor Free Edition 3.2.19 (by Power Admin LLC)
Monitors Windows event log, web pages, and ping response

WatchDISK Disk Space Tracker 3.2.19 (by Power Admin LLC)
Track disk usage on server volumes over time. Reports, alerts and more.

Server Monitor Free Edition 2.2.8 (by Power Admin LLC)
Monitors Windows event log, web pages, and ping response

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

DEKSI Network Monitor 4.8.2 (by DEK Software International)
An advanced, powerful, and feature rich network Monitor

Sentry-go Quick Server Monitor 4.2 (by 3Ds (UK) Limited)
Monitor your Windows PC, take automatic action or alert when problems arise

PMP 7.3.1 (by Eastbow Lab)
Performance monitor for remote/multiple Windows servers.

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

NTP Server Monitor 1.0.001 (by ntp time server)
Allows any number of NTP time servers to be constantly monitored

PA Server Monitor Free Edition 3.2.19 (by Power Admin LLC)
Monitors Windows event log, web pages, and ping response

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

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

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

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.