Hi all
I recently published, on SSRN, this paper
Shackman, Gene, Free To Use Statistical Software: Comparing Statistical Analyses (May 10, 2022).
https://papers.ssrn.com/sol3/papers.cfm?abstract_id=4105959
The good news is that all the packages give the same statistical results. They don't all have all the same analyses available, but when they do, their results are pretty much the same.
I include PSPP, among others. I'll periodically update the paper, when new versions of software come out.
I hope you all find it useful.
And, stay healthy.
Thanks
Gene