R Commander is a GUI for the R programming language, licensed under the GNU General Public License, and developed and maintained by John Fox in the sociology department at McMaster University. Among the existing R GUIs, Rcmdr together with its plug-ins is perhaps the most viable R-alternative to commercial statistical packages like SPSS. The package is useful to R novices, since for each analysis run it displays the underlying R code.Rcmdr can be installed from within R, like any R package.