In Pictures: 13 useful add-ons for Microsoft Excel...
Bubbles for Excel 2013
This app takes selected data in your spreadsheet and represents it in a chart as bubbles -- the size and color of each is based on the number of times a certain value appears. Data from two tables can be “bubbled” so you can compare their differences with this whimsical model.
In Pictures: 13 useful add-ons for Microsoft Excel and Word 2013