There is a whole range of statistical Add-Ins for Excel. StatSci portal for statistical computing provides a comprehensive list:

Free statistical Add-Ins for Excel:

  • Daniel’s XL Toolbox – an  open-source add-in for analysing and presenting data.
  • dkstatisticalconsulting – Excel templates for some commonly used statistical tests.
  • EZSXL – a statistical package for Excel under Windows designed for auditors and fraud investigators.
  • Real Statistics Resource Pack – contains a variety of supplemental functions and data analysis tools not provided by Excel.
  • XLStatistics – Excel workbooks for basic statistical analyses developed at Deakin University.

Commercial statistical Add-Ins for Excel:

  • Ad Science -  a statistical analysis add-in for Excel for common statistical testing, medical statistical testing and factor analysis. A free trial version is available.
  • Analyse-It – statistical analysis tool for Microsoft Excel. Orientated towards analysis of clinical experiments. Includes standard statistical techniques up to multiple regression and two-way analysis of variance. A 14-day evaluation version is available
  • ezForecaster – time series and regression forecasting for business applications. A free 30-day trial is available.
  • Lumenaut – statistical and decision tree add-in for Excel aimed at business applications. Includes regression, logistic regression, decision trees and some time series. A 15-day trial is available.
  • NeuroXL – neural network add-ons for Excel. A 10-day trial is available
  • NumXL – econometric and time-domain time-series models. A free trial version is available.
  • SigmaXL – statistical and graphical analyses, with emphasis on business statistics. A free 30-day trial is available.
  • Statistician – data analysis and statistics add-in for Excel. Includes multiple regression, logistic regression and Poisson regression as well as elementary t-tests. A free lite version is available.
  • UNISTAT – works as a stand-alone package or an an Excel add-in. Includes a wide range of statistical methodology including logistic regression, classification and clustering. A free lite version is available.
  • XLSTAT  – data analysis and statistics add-in for Excel. Includes logistic and probit regression, nonlinear regression, multiple regression and so on. A free 30-day trial is available.
  • WinSTAT – statistics add-in for MS-Excel. R Finch Software. A free 30-day trial is available.