Interactive Geometry with JavaScript

 JSXGraph is a cross-browser library to display interactive geometry in a
 web browser. It is implemented in JavaScript and uses SVG and VML.
 At the moment the following browsers are supported: Mozilla Firefox,
 Opera, Safari, Google Chrome, Microsoft Internet Explorer.
 .
 There are still some issues with JSXGraph in the Internet Explorer, so
 using Firefox, Opera, Safari or Chrome is recommended.
 .
 JSXGraph is easy to embed and has a small footprint: only 50 kB if
 embedded in a web page. No plugins are required!