PA Server Monitor
PA Server Monitor is a Windows service that monitors the health and availability of Windows servers, network services (on Windows, Linux and other operating systems), and devices. No agents are needed to monitor remote servers. Also includes rich reporting on most monitored resources. ... PA Server Monitor can watch: Event logs on local and remote Windows servers CPU and memory usage Free local and server disk space Changed files and directories (great intrusion detection) Running Windows services Custom script results Local and remote directory quota monitoring Network Interface...
http://www.poweradmin.com/servermonitor/servermonitorpro.exe - 5Mb - Download - Screenshot

Easy Network Service Monitor
Easy Service Monitor is a network fault management tool that continuously monitors network devices and services. If something went wrong, it will alert you by email/phone/pager BEFORE problems get seriously out of hand. A detailed log file will record every event of the monitored targets and can... You can configure the system so that when something goes wrong, a set of actions, such as execute a program, reboot server or update web page, will be triggered.
http://www.javvin.com/emonitor.exe - 2Mb - Download - Screenshot

Professional Edition
The Professional Edition is a collection of 29 Network Discovery, Monitoring and Management tools. SolarWinds Networking tools install in seconds and allow you to be producing reports in minutes. Monitor traffic on a router with BANDWIDTH MONITOR, generate a detailed Network Inventory with IP... The Complete set includes: Advanced Subnet Calculator, Bandwidth Monitor, MAC Address Discovery, Syslog Server, Config Viewer, Config Uploader, DHCP Scope Monitor, DNS Audit, DNS / Whois Resolver, Enhanced Ping , IP Network Browser, MIB Walk, Network Address Recovery, Network Monitor, Network...
http://solarwinds.net/downloads/SolarWinds2002-PE-Eval.exe - 16Mb - Download - Screenshot

Monitor one
Monitor one, is an easy to use and rich-featured SNMP Network management and monitoring application. It allows Network managers to monitor all of their networking devices (Routers, Switches, Servers, etc.. ) at a glance through an intuitive (native and web-based) graphical network map on a... Small networks (less than 8 objects) can be managed for free. ... Monitor one includes powerful features like: SNMP MIB data retrieval, MIB compiler, Status polling, Health polling, Threshold monitoring and Trending, Syslog server, Device discovery, Alerting and a MIB browser.
http://dl.filekicker.com/send/file/173632-4833/MonitoroneLV.exe - 16Mb - Download

SolarWinds Professional Toolset
The Professional Toolset is a collection of over 30 Network Discovery, Monitoring and Management tools. SolarWinds NetworkingTools install in seconds and allow you to be producing reports in minutes. Monitor traffic on a router with BANDWIDTH MONITOR, generate a detailed Network Inventory with... The Complete set includes: Advanced Subnet Calculator, Bandwidth Monitor, MAC Address Discovery, Syslog Server, Config Viewer, Config Uploader, DHCP Scope Monitor, DNS Audit, DNS / Whois Resolver, Enhanced Ping , IP Network Browser, MIB Walk, Network Address Recovery, Network Monitor, Network...
http://www2.solarwinds.net/downloa...rWinds-PE-V8-Eval.exe?CMP=LEC-TSS - 16Mb - Download - Screenshot

IPCheck Server Monitor
IPCheck Server Monitor 5 helps organizations monitor critical network resources and immediately detect system failures or performance problems. It offers reliable network and website monitoring using Paessler's IPCheck? Technology, fast and easy installation, support for Windows NT/2000/XP/2003... The Freeware Edition monitors up to three sensors and is limited to PING, PORT and HTTP sensors and can be upgraded to the full feature set by requesting a Free 30 Day Trial License or by purchasing a Full License.
http://download2.paessler.com/download/ipcheck.zip - 16Mb - Download - Screenshot

PC Sentinel's Busted: Keylogger and Instant Message Monitor
PC Sentinel? s Busted! secretly records and monitors instant messages, web sites visited, applications used, every keystroke, and even takes periodic screen shots! Even novices think PC Sentinel's Busted! is the easiest-to-use monitoring and surveillance software on the market. ... If you are a busy parent or small-business owner who wants full-featured keylogger, monitoring and surveillance software without having to take a course in network engineering, then PC Sentinel's Busted! ... Free to try!
http://www.keylogger.bz/products/busted/setup.exe - 1Mb - Download - Screenshot

VE Network Catcher (Lite)
Network Catcher, from Shunra Software, is a free network monitoring tool that records and displays latency and packet loss between your PC and any internet site. Use this freeware tool to monitor the quality of your network link. You can save all your recordings and send it to another user via... However, if the target network has not yet been designed or built out, you can record a variety of different production networks and create a library of production network conditions which you can then use to test your applications and ensure that that they meet performance expectations in any...
http://www.shunra.com/downloads/VENetworkCatcherLite.zip - 533Kb - Download - Screenshot

IPSpaceMon
Are you an over-worked network administrator? Get calls complaining about system outages you have no way of monitoring? Are you sufferring from server crashes or data loss due to lack of hard drive space? SpaceMon makes it easy to watch network storage space and alert you from your current... If any one of the network resources dips below the alert level you set, you will be notified visualy, audibly, by email and through your current network monitoring tool*. ... Simply type in the resources you want monitored (drive letters or UNC paths) and the level of free space you want to be alerted...
http://www.ipworx.com/product/spacemon/spacemn3.zip - 4Mb - Download - Screenshot

ManageEngine Applications Manager
Applications Manager offers a single integrated monitoring tool suitable for application monitoring, database monitoring, system monitoring, website monitoring, services monitoring, and custom application monitoring. Applications Manager proactively monitors the applications and servers and... You can manage 5 monitors in your network using the free edition. ... Custom Monitors enables you to create JMX consoles and SNMP Consoles and to monitor your Java applications or other applications that expose management information through SNMP & JMX.
http://download.adventnet.com/prod...ageEngine_ApplicationsManager.exe - 16Mb - Download - Screenshot