I have used Minitab, SAS, and S-Plus in Windows. In Linux, I use a package called R. It is an OSS version of S-Plus available for Windows, MacOS, and Linux. Scripts are portable between OS platforms and between R and S-Plus. There are many add-on packages available and you can create your own if needed.
Here is the URL for the R home page ->
http://www.r-project.org/
I am a Reliability Engineer, undergraduate work in Electrical Engineering, graduate work in Statistics. I use R on Linux almost exclusively these days.