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by superflit 3688 days ago
The one I use is HighCharts [1]

Very clean and very good.

[1] - http://www.highcharts.com/
1 comments
stadeschuldt 3687 days ago
I love HighCharts and use it for my open-source project at http://solarpi.tafkas.net

If you have a commercial product you have to pay for the license though.

link