PSPP is described as 'Free software application for analysis of sampled data. It has a graphical user interface and conventional command line interface. It is written in C, uses GNU Scientific Library for its mathematical routines, and plotutils for generating graphs' and is a statistical analyzer in the development category. There are more than 25 alternatives to PSPP for a variety of platforms, including Windows, Mac, Linux, Web-based and Xfce apps. The best PSPP alternative is R (programming language), which is both free and Open Source. Other great apps like PSPP are RStudio, JASP, IBM SPSS Statistics and jamovi.
Excellent, good graphing capacity, no coding necessary. But you can produce R code from your GUI.