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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