Network Monitoring Software

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  NetworkOpenedFilesFree

  Displays the list of all files that are currently opened by other computers on your network.

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  NetworkTrafficViewFree

  A network monitoring tool that captures the packets pass through your network adapter, and displays general statistics about your network traffic.

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  WhoIsConnectedSnifferFree

  Detect who is connected to your network without scanning.

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  DNSLookupViewFree
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  Connections ViewerFree to try
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  LiveTcpUdpWatchFree

  Displays live information about all TCP and UDP activity on your system. 

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  NetLimiterFree to try

  An ultimate internet/network control, security and statistical tool for Windows.

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  Network MeterFree

  Tool for network traffic measuring.

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  ShaPlus Bandwidth MeterFree

  Bandwidth monitoring software to track Internet bandwidth usage.

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  NetworkCountersWatchFree

  A tool for Windows that displays system counters for every network interface on your system.