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.
ZingChart - ZingChart is a fast, modern, powerful JavaScript charting library for building animated, interactive charts and graphs. Bring on the big data!
Image Charts - No more pain rendering charts server-side.
Highcharts - A charting library written in pure JavaScript, offering an easy way of adding interactive charts to your web site or web application
ChartURL - Add rich, data-driven charts to web & mobile apps, Slack bots, and emails. Send us data, and we return an image that renders perfectly on all platforms.