JGCharts
http://www.maxb.net/scripts/jgcharts/include/demo/
plotkit
http://solutoire.com/flotr/docs/
flotr
http://solutoire.com/flotr/docs/
YUI Chart
http://developer.yahoo.com/yui/charts/
EXT
http://www.extjs.com/products/js/
protochart
http://www.deensoft.com/lab/protochart/
fgCharting
http://www.filamentgroup.com/lab/update_to_jquery_visualize_accessible_charts_with_html5_from_designing_with/
个人比较推荐YUI和jqFlot
