Another alterative is JSFlot, which is Open Source and released via Google Code. JSFlot Google Code Site under the MIT license.
There is also a Live Demonstration of JSFlot here: JSFlot Live Demo
Some example charts generated with JSFlot:
JSFlot - Open Source JSF Chart library for drawing in-browser interactive charts.
When it is used for evil, then watch out! When it is used for good, then things are much nicer. Like this tiny ad: