Bandwidth Monitor 

Bandwidth Monitor tracks all network connections traffic and displays real-time graphical and numerical data transfer rates. It can display multiple connections rates at the same time. Bandwidth Monitor works with all types of network connections.
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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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