Google Charts - Interactive charts for browsers and mobile devices.
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ZingChart - ZingChart is a fast, modern, powerful JavaScript charting library for building animated, interactive charts and graphs. Bring on the big data!
Mailbutler - Mailbutler adds lacking functionality to email clients and increases your productivity
Highcharts - A charting library written in pure JavaScript, offering an easy way of adding interactive charts to your web site or web application
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