- Insightful (makers of S-Plus)
- The Mathworks (makers of Matlab)
- Minitab, Inc.
- Multivariate Statistics - A Practical Guide
- Mx Home Page (statistical modeling package)
- The Numerical Algorithms Group Ltd
- Research in Prevention Laboratory (RIPL)
- SAS Institute
- SEMNET
- SPSS, Inc.
- Statsoft (makers of Statistica)
- Wolfram Research (makers of Mathematica)
- The R Project (a free software environment for statistical computing and graphics)