Traffic Counter 

Traffic Counter is an easy-to-use tool to display and count network traffic of your computer. The traffic counter reports daily and monthly traffic. It allows you to set monthly traffic limit, alerts you when the amount of the traffic is used.
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Web-Traffic-Counter 

Here's a free, quick and fun way to add cute disposable counters to any web page or Ebay auction -- without the hassle of signing up with some counter site and with the risk of giving away your personal information.
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Paessler SNMP Tester 

Test and debug SNMP requests with Paessler SNMP Tester for free. Run simple SNMP requests against a device in your network, testing each single step of the SNMP request as it is logged into a logfile for analysis.
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