NetVizor
NetVizor is the latest in powerful network surveillance. Monitor your entire network from one centralized location! NetVizor allows you to track workstations and individual users that may use multiple PC's on a network. NetVizor tracks keystrokes, websites, programs ran, and much more! ... Combined with real-time remote surveillance and individual user monitoring, NetVizor is the most comprehensive network monitoring solution available!
http://www.spytechonline.com/Files/netvizor.zip - 3Mb - Download - Screenshot

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

Net Monitor for Employees
The Network LookOut Administrator allows you to see live screens of remote computers. This way, you can always watch what users are doing on the remote computer. Additionally, you have the ability to take control of a remote computer by controlling the mouse and keyboard; this is especially... For monitoring students in the classroom to achieve better discipline or, just to assist them (by using the remote control feature) when they are in trouble. ... Using the remote control feature enables you to fix problems remotely without visiting them; this saves you precious time.
http://www.networklookout.com/dwn/nmemployees.exe - 3Mb - Download - Screenshot

Network LookOut Administrator
The Network LookOut Administrator allows you to see live screens of remote computers. This way, you can always watch what users are doing on the remote computer. Additionally, you have the ability to take control of a remote computer by controlling the mouse and keyboard; this is especially... For monitoring students in the classroom to achieve better discipline or, just to assist them (by using the remote control feature) when they are in trouble. ... Using the remote control feature enables you to fix problems remotely without visiting them; this saves you precious time.
http://www.networklookout.com/dwn/nladmin.exe - 3Mb - Download - Screenshot

Network LookOut Administrator Pro
The Network LookOut Administrator Professional allows you to see live screens of remote computers. This way, you can always watch what users are doing on the remote computer. Additionally, you have the ability to take control of a remote computer by controlling the mouse and keyboard; this is... For monitoring students in the classroom to achieve better discipline or, just to assist them (by using the remote control feature) when they are in trouble. ... For monitoring your children's activities on a remote computer.
http://www.networklookout.com/dwn/nmadminpro.exe - 9Mb - Download - Screenshot

10-Strike LANState
The program is designed for Microsoft Windows network administrators. LANState is a visual network map with monitoring functionality which allows you to see the state of your network at any time. It displays network map and monitors device state (active/inactive) in real-time. ... LANState does not require installing any client software on the remote computers on your network. ... Monitoring load of your network card (incoming/outgoing traffic). ... Monitoring the usage of your shared resources by other users of the network.
http://www.10-strike.com/lanstate/lanstate.zip - 2Mb - Download - Screenshot

Active SMART
Active SMART is an industry leading S. M. A. R. T. diagnostic and failure prediction software for hard drives. It uses S. M. A. R. T. (Self-Monitoring, Analysis and Reporting Technology) to monitor the health status of Hard Disk Drives, monitors the drives temperature, prevents data loss and... Various local and remote monitoring modes and alerting options are available. ... In case of error detection, there is a range of alerting options available: local (pop up messages, sound) and remote (e-mail or network messenger).
http://www.ariolic.com/download/activesmart.exe - 1,002Kb - Download - Screenshot

IPMonitor
IPMonitor is a sophisticated network monitoring solution that allows network administrators, webmasters, and Internet service providers to monitor any networked device on the Internet, corporate intranet, or TCP/IP LAN and receive alerts immediately via audible alarm, message, e-mail, or... Main features: runs as a system tray application automatically on startup, monitors up to 500 network devices or services simultaneously, allows quick network resource configuration, allows all parameters to be set independently for each network resource, permits you to temporarily disable monitoring of...
http://ipmonitor.tsarfin.com/downloads/ipmonitor.zip - 1Mb - Download - Screenshot

CommView Remote Agent
CommView Remote Agent is an application for remote network traffic monitoring. It allows CommView users to capture network traffic on any computer where Remote Agent is running, regardless of the computer's physical location. This new, unique technology broadens your horizons: you are no longer... CommView Remote Agent is an indispensable tool for networking, software, and security professionals that can solve a wide range of problems, such as monitoring multi-segment LANs or remote software and network troubleshooting.
http://www.tamos.com/files/cvra2.zip - 2Mb - Download

Advanced Net Monitor for Classroom Professional
Net Monitor for Classroom is a program that allows a 'view' of a computer monitor of a remote computer, which is connected to the network. To be able to view a computer monitor of the remote computer, the program Net Objective, which you receive with the program Net Monitor for Classroom, must... After that, the program displays the windows of all remote computers, where with time (depending on the adjustments) the picture appears, which is displayed on the monitor of the remote computer. ... Teacher can lock the remote computers at any time.
http://www.eduiq.com/dwn/advnetmonpro.exe - 2Mb - Download - Screenshot