RGraph is a free graph library that uses the HTML5 canvas tag.

Using the library, it is possible to create a wide variety of graph types:

  • bar, pie, donut, gantt, radar, funnel, bi-polar charts
  • line and scatter graphs
  • LED display
  • meter
  • odometer
  • progress bar

RGraph HTML5 Chart

The charts are interactive (respond to mouse-overs and clicks) and, optionally, they can load with animations or zoom to a specific point.

There is also an annotation feature where you can draw over the graphs for highlighting them.

P.S. RGraph is only free for personal use.

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