Since I last posted about Free software tools I have found other great Industrial Engineering tools. Statistics plays a major role for the Industrial Engineer and Operations Research analyst. There are a huge amount of statistical tools in the market for computers and software. I have found that there is numerous Free Software tools available for analyzing statistics and data sets.
Here is a Free Software equivalents table for statistical software
S, SAS --> R-Project
Matlab, Scilab --> SciPy (requires Python programming language)
SPSS --> PSPP