IPCheck Server Monitor 5.3.1.586 (by Paessler AG)
Server Uptime/Downtime Monitor - alerts staff if a server or network is down

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

PRTG - Paessler Router Traffic Grapher 5.3.0.833 (by Paessler AG)
Monitor and classify bandwidth and network usage. Easy to use Windows software.

Webserver Stress Tool 7.1.1.229 (by Paessler AG)
Webserver load, performance and stress test simulates simultaneous server users.

Paessler SNMP Tester 2.2 (by Paessler AG)
Test and debug SNMP requests against a device in your network.

Paessler SNMP Tester 2.2 (by Paessler AG)
Test and debug SNMP requests against a device in your network.

MIB Browser 1.03 (by KS-Soft)
MIB Browser displays the hierarchy of SNMP MIB variables, requests SNMP agents

Adventnet SNMP API .NET 4 (by Adventnet Inc.)
AdventNet SNMP API .NET offers a comprehensive toolkit for SNMP-based networks.

Adventnet SNMP Utilities 4 (by Adventnet Inc.)
AdventNet SNMP Utilities offers a comprehensive toolkit for SNMP-based networks.

AdventNet SNMP API - Free Edition 4 (by Adventnet)
AdventNet offers a comprehensive development toolkit for SNMP-based networks.

LoriotPro Free Edition 4.0 (by LUTEUS)
Powerful graphical Windows-based SNMP manager.

AdventNet SNMP API - Free Edition 4 (by Adventnet)
AdventNet offers a comprehensive development toolkit for SNMP-based networks.

AdRem SNMP Manager 1.0 (by AdRem Software)
Enterprise-class console for full-fledged SNMP control of remote network devices

XR SNMP Tools 3.5 (by XRatel Software)
Set of high performance tools for monitoring network SNMP manageable devices.

XRatel SNMP OPC/DDE Server 4.5 (by XRatel Software)
SNMP based network links and device's monitoring for OPC or DDE clients

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.