Question : HighCharts alternatives

Hi,
What alternatives to HighCharts exists for charting? If so,
a) please indicate the type - javascript, flash, etc.?
b) does it have adapters or plugins for ExtJS

Thanks,
P

Answer : HighCharts alternatives

This website is helpful too.
http://www.ajaxline.com/10-best-free-javascript-charts-solutions
The JS Chart is probably the best of all.
Good Luck!