This isn't a review of the packages, but a look at which ones are popular, not limited to free onesħ Great Linux Statistical Analysis Tools. The Popularity of Data Analysis Software, by Robert A. See this article at Citizendium about free statistical software. For the packages that have regression, these all give the same results too.
See my review of easy to use packages: Free To Use Statistical Software: Comparing Statistical Analyses I find all packages give the same, results, for outputs of frequencies, means, and correlation. There are many free statistical programs. Also, I'm not necessarily recommending any, just providing info and links. I'm sorry to add the usual disclaimer that, while I don't expect any problems with them, if you use any of these, I can't be responsible for any problems that may occur. If there are any major problems, I'll take them off this list. If you use them, please let me know how well they work. Please note : I've only used a few of these software programs a little bit, so I can't say much about how good they are, whether they crash, have viruses, or much else about them. At the bottom of this page, I list a few sites that have information about what "free" means. Some of the packages are also open, that is, they are free to use and the source code is freely available so anyone can make modifications to the programs if they wish to. In some cases, there may be charges to institutions. Many of the websites say that individuals are free to download and use the packages. All of the packages are free to use, that is: there is no charge for individuals to use them. This page lists primarily statistical software, along with mapping, spreadsheets, database, stuff to do data analysis or management.
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