RStudio - RStudio™ is a new integrated development environment (IDE) for R.

SMath Studio - Tiny, powerful, free mathematical program with WYSIWYG editor and complete units of measurements support.

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.

Wolfram Mathematica - Mathematica has characterized the cutting edge in specialized processing—and gave the chief calculation environment to a large number of pioneers, instructors, understudies, and others around the globe.

IBM SPSS Statistics - IBM SPSS Statistics is software that provides detailed analysis of statistical data. The company behind the product practically needs no introduction, as it's been a staple of the technology industry for over 100 years.

MATLAB - A high-level language and interactive environment for numerical computation, visualization, and programming