Data Curve Fit Creator Add-in adds a set of curve fitting, spline, interpolation and data smoothing functions to Microsoft Excel. It allows you to do data analysis and forecasting directly in the program that you are familiar and comfortable with - Excel. Included in the install is a "How To" Excel workbook that shows, in detail, how all the functions work.

The license of this software is Free Trial Software, the price is $29.95, you can free download and get a free trial.