PSPP is a free program for statistical analysis of sampled data. It is similar to SPSS with a few exceptions. PSPP is particularly aimed at statisticians, social scientists and students requiring fast convenient analysis of sampled data.
GNU does not distribute precompiled binaries of PSPP, but many operating systems come with them, though not always the most recent version. On the PSPP website is a list of some PSPP binaries for some operating systems. Because the PSPP developers have not prepared these binaries, they cannot in general vouch for them.
For more information about PSPP, visit the PSPP website for more information.