QuickChart - QuickChart is easy to use and open-source open API that makes it easy to generate chart images.
Infogram - Make charts & infographics that people love
Google Charts - Interactive charts for browsers and mobile devices.
Mind the Graph - Infographic maker for scientists
Image Charts - No more pain rendering charts server-side.
Visme - One easy to use online tool to visualize your ideas to engaging Presentations, Infographics and other Visual Content.