This is a JQuery Chart Plugin, that gives you the possibility to create your own unique chart with full customization. At present, there are six main modes: evaluation, pyramid, line, pie, doughnut and progress. Grafikon is easy to use and it is fully customizable – colors, sections, levels, fonts settings and many more.
Open source HTML5 charts using the canvas tag. Chart.js is an easy way to include animated graphs on your website.
Arbor is a graph visualization library built with web workers and jQuery. Rather than trying to be an all-encompassing framework, arbor
provides an efficient, force-directed layout algorithm plus abstractions for graph organization and screen refresh handling.
Flotr2 is a library for drawing HTML5 charts and graphs. It is a branch of flotr which removes the Prototype dependency and includes many improvements.
RGraph is a HTML5 canvas based library built for website charts and supports over twenty different types of visualisation. Using the new
Protovis composes custom views of data with simple marks such as bars and dots. Unlike low-level graphics libraries that quickly become tedious for visualization, Protovis defines marks through dynamic properties that encode data, allowing inheritance, scales and layouts to simplify construction.
This list really is incomplete without zoomcharts.com in it 😉