I work on a complicated graph for a website before, we used highchart as the solution, during that time, there isn't a lot of plugins to choose from, but now, we can easily find many very capable charting libraries. Personally, the rise of this kind of plugins are due to: Flash used to be the best solution, but everyone is moving on from there.Modern browsers and powerful computing make it possible to render live data easily.Maturity of different technologies in drawing vector: VML, SVG and Canvas. Of course, you need to carefully choose one that fit your requirements. As we mentioned before, they use various technologies, as a result, some plugins support canvas only which require modern browsers, and other combine multiple technologies altogether so it able to work on different platforms and older browsers.
It is a branch of flotr which removes the Prototype dependency and includes many improvements. Tquila/jOrgChart - GitHub. d3.js. Progressive <canvas> pie charts. Peity (sounds like deity) is a simple jQuery plugin that converts an element's content into a simple <svg> mini pie 2/5 donut 5,2,3 line 5,3,9,6,5,9,7,3,5,2 or bar chart 5,3,9,6,5,9,7,3,5,2 and is compatible with any browser that supports <svg>: Chrome, Firefox, IE9+, Opera, Safari.
Download version 3.1.1 Uncompressed 8.6Kb jquery.peity.js.