What are some alternatives?
When comparing SOFA Statistics and IBM SPSS Statistics, you can also consider the following products
PSPP - PSPP is a free software application for analysis of sampled data.
RStudio - RStudio™ is a new integrated development environment (IDE) for R.
JASP - JASP, a low fat alternative to SPSS, a delicious alternative to R.
Stata - Stata is a software that combines hundreds of different statistical tools into one user interface. Everything from data management to statistical analysis to publication-quality graphics is supported by Stata. Read more about Stata.
RKWard - RKWard is an easy to use, transparent frontend to the R programming language, a very powerful, yet...
JMP - JMP is a data representation tool that empowers the engineers, mathematicians and scientists to explore the any of data visually.