Another one that I recently saw (on hacker news) was http://www.highcharts.com/ http://www.highcharts.com/ - but dygraph renders much faster, you can actually w

Another one that I recently saw (on hacker news) was http://www.highcharts.com/ http://www.highcharts.com/ - but dygraph renders much faster, you can actually watch the highcharts library draw as if it was animated.