Kutools for Excel - A handy Microsoft Excel add-ins collection to free you from time-consuming operations.
Google Charts - Interactive charts for browsers and mobile devices.
Mekko Graphics - Use the Mekko Graphics charting software to make 30 chart types, including the marimekko chart, bar mekko chart, cascade/waterfall chart, bubble chart, bar chart, gantt chart and more.
Highcharts - A charting library written in pure JavaScript, offering an easy way of adding interactive charts to your web site or web application
Excel Dashboard School - Free Excel add-ins and tools on Excel Dashboard School. Boost your work productivity and save your time! No trials, 100% power!
ZoomCharts - Creating meaningful and aesthetically pleasing data visualizations and incorporating them into your projects is easy with the tools offered by ZoomCharts.