ZoomCharts - Creating meaningful and aesthetically pleasing data visualizations and incorporating them into your projects is easy with the tools offered by ZoomCharts.
QuickChart - QuickChart is easy to use and open-source open API that makes it easy to generate chart images.
Google Charts - Interactive charts for browsers and mobile devices.
Highcharts - A charting library written in pure JavaScript, offering an easy way of adding interactive charts to your web site or web application
Image Charts - No more pain rendering charts server-side.
ZingChart - ZingChart is a fast, modern, powerful JavaScript charting library for building animated, interactive charts and graphs. Bring on the big data!