BlueSky Statistics – BlueSky is a free and open source data science package for Microsoft Windows and Mac. It offers extensive features for data management, visualization, statistical analysis, and machine learning. Its point-and-click user interface is easy to learn and use. Behind the scenes it uses the powerful R language. If you wish to learn R programming, you can ask BlueSky to show you the R code that it writes. It uses the popular ggplot R package for visualization and tidyverse commands for data management.