Google Chart Tools

<script src='http://www.google.com/jsapi'></script>
<script>
google.load('visualization', '1', {'packages':['piechart']});
google.setOnLoadCallback(drawChart);
function drawChart() {
var data = new google.visualization.DataTable();
data.addColumn('string', 'Task');
data.addColumn('number', 'Hours per Day');
data.addRows([
['Mootools', 35],
['CSS', 17],
['HTML', 25],
['MySql', 23],
['PHP', 10]
]);
var chart = new google.visualization.PieChart(document.getElementById('chart_div'));
chart.draw(data, {width: 400, height: 240, is3D: true, title: 'Pie Chart'});
}
</script>
<div id='chart_div'></div>

http://code.google.com/apis/charttools/docs/choosing.html

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