Depending on licensing requirements and features you have a few options. SVG is not supported from IE 6 to IE8 so you may find some libraries using canvas to run on IE, and others using VML to run on IE.
-
Plotkit is a mixed SVG+Canvas library, latest version is a bit outdated (0.9.1 released in 29 August 2006) BSD licensed.
-
Elycharts is an SVG+VML library (using RaphaelJS under the hood) with a good feature set, interactivity and cool animations. (last version 2.1.3 from December 2010) Mit licensed.
-
g.raphael is an SVG+VML library (using RaphaelJS, from the same author of RaphaelJS). It is very good for infographics, less good for classical charts. (last version 0.4.1 from 2009) Mit Licensed.
-
Grafico is again an SVG+VML library (again RaphaelJS based). It has much more chart types than gRaphael or Elycharts but less options/configurability than Elycharts. MIT licensed.
-
Google Chart Tools provides SVG+VML based charts. It’s free to use but I didn’t find the complete licensing terms. It also provides an editor (even if it is not easy to find on their site)
-
D3.js Is a JavaScript library for manipulating documents based on data. D3 helps you bring data to life using HTML, SVG and CSS.
You also have some commercial option:
-
ZingChart – This is the only library allowing SVG, VML, canvas and flash in order to support every device out there. It is expensive but very complete.
-
HighCharts – A very complete SVG+VML library having a very good documentation and a very complete feature set. It has a free for personal use license but it shows a very “strict” interpretation of personal and your own blog may not be considered “personal”, that’s why I show it under “commercial options”.