Free network monitor 1.2 software for windows

Qt Network Monitor is built in C++ and uses the underlying library libpcap / WinPcap to gather information about the network traffic. The GUI is built in QT and faily independent from the implementation of the device listener.
Qt Network Monitor is a open source bandwidth monitor written using Qt and LibScp/WinScp. Works well under Linux too though you have to compile it yourself.The application allows to monitor a device. You start the program, chose a device and put the application to the tray. You can then know how much bandwidth you are taking at any time.

Advanced Network Monitor 6 is a rather praiseworthy program that will test your Web site or IP, accurately detecting Web site errors and downtime within seconds.

As soon as an error is detected, notification e-mail will be sent to you, with a description of the error. If your Web site or service goes down, Advanced Network Monitor will immediately notify your distribution list and e-mail a report for your reference. Many times an individual website or service can go down without the whole server failing and will be undetectable by the hosting service provider.

Display all kind of information in real time about all network adapters Network Monitor application was designed to display all kind of information in real time about all network adapters (network cards, RAS connections, virtual cards, server monitoring for web hosting) in your system.
Network Monitor displays for each network adapter: download speed, upload speed, data transfered, IP address, MTU size, adapter type, MAC address, status and many more.

SysUpTime network/server monitor is a powerful agentless network management product. It provides users out-of-box capabilities to efficiently and proactively manage any network of any size.
SysUpTime network monitor is easy to set up and use. It can monitor the availability and performance of your Windows and Linux/UNIX servers, workstations, software applications (SQL, Exchange, Web Servers, etc), and network devices (routers, switches, etc). When a failure is detected, SysUpTime network monitor can alert the administrators by email, sound, running a script or other methods, as well as taking corrective actions such as executing remote Windows/Linux command, rebooting the machine, restarting the Windows/Linux service or running a script.
SysUpTime network monitor runs on Windows 2000/XP/2003 and Linux, and is competitively priced.