When you say zoomable charts, do you mean like the one here http://www.highcharts.com/demo/dynamic-master-detail http://www.highcharts.com/demo/dynamic-master-d

When you say zoomable charts, do you mean like the one here http://www.highcharts.com/demo/dynamic-master-detail http://www.highcharts.com/demo/dynamic-master-detail ? flot.js has zooming/panning capabilities - http://people.iola.dk/olau/flot/examples/selection.html http://people.iola.dk/olau/flot/examples/selection.html This, assuming I understood what you were getting at. Needless to say, HighCharts is slick - but flot.js has a nice price tag :)