Plotly - Low-Code Data Apps
QuickChart - QuickChart is easy to use and open-source open API that makes it easy to generate chart images.
RAWGraphs - RAWGraphs is an open source app built with the goal of making the visualization of complex data...
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.
Datamatic.io - Datamatic - WordPress for data visualizations
Google Charts - Interactive charts for browsers and mobile devices.