My thanks to the FlowingData sponsors. They keep the lights on and keep FlowingData going strong. Check out the services they have to offer. They help you make sense of your data.
Zoho Reports - Offers an intuitive drag-and-drop interface that assists you to easily do in-depth reporting and visual analysis of your business data. It is best suited for SMBs using spreadsheets or custom software for data analysis.
Tableau Software - Combines data exploration and visual analytics in an easy-to-use data analysis tool you can quickly master. It makes data analysis easy and fun. Customers are working 5 to 20 times faster using Tableau.
Grapheur - Once upon a time data analysis and business intelligence used to be complex, slow, static and boring. Not anymore with Grapheur: import your data and navigate a the speed of light. The tool disappears, your preferences and insight come into the spotlight.