I wrote Spreadsheet.io that is similar to Google Refine (and Fusion Tables) and performs various data type analysis for visualization, etc. There's also a nati

I wrote Spreadsheet.io that is similar to Google Refine (and Fusion Tables) and performs various data type analysis for visualization, etc. There's also a native Excel add-in that enables a Javascript API bridge to an existing sheet. Working on a release.. it's been a side project.