IDBS XLfit5 5.3.1.3 was free to download from our software library. The program belongs to Education Tools. This program is a product of IDBS.
From the developer:
XLfit is a powerful curve-fitting and data analysis package that integrates completely with Microsoft® Excel. XLfit offers an extensive selection of data analysis and calculation tools, including a superior range of fit and statistics models as well as charts and graphs to visualize, interpret and present experimental data, all in Excel.
You may want to check out more software, such as IDBE CmdBar Converter, IDBE Tools 2010 or IDBE RibbonCreator 2013, which might be related to IDBS XLfit5.