Best open library for creating HTML 5/Javascript statistics page and charts

I am simply looking for the commun开发者_运维技巧ities recommendation on an open library to help develop statistical charts, graphs, and maps for a website with HTML 5 / javascript. Something similar to what fusion charts does but without having to pay an arm and a leg and having access to the deep code.

Thank you everyone. :)

Flot and Highcharts are both pretty decent. They both require JQuery.

Raphael is another great choice, supports all browsers including IE6.

jQuery + any number of plugins designed just for that.

The Filament group has been doing a lot of work on that:

http://www.filamentgroup.com/lab/update_to_jquery_visualize_accessible_charts_with_html5_from_designing_with/

Take a look at Dojo Charting

It's very nice library for charting.

Check out Google's Visualization API.