Arbor!

D3 allows you to bind arbitrary data to a Document Object Model (DOM), and then apply data-driven transformations to the document. For example, you can use D3 to generate an HTML table from an array of numbers. Or, use the same data to create an interactive SVG bar chart with smooth transitions and interaction.

Graphviz is open source graph visualization software. It has several main graph layout programs. It also has web and interactive graphical interfaces, and auxiliary tools, libraries, and language bindings.

Easy, object oriented client side graphs for designers and developers.Open source HTML5 charts using the canvas tag. Chart.js is an easy way to include animated graphs on your website.

Frappé Charts is a simple, responsive, modern charts library for the web with zero dependencies and a roughly 15k gzipped file size. From the makers of ERPNext, the library offers a fast alternative with minimal effort needed to visualize data in sleek charts.