EpiInfo

P-STAT, Inc

SAS

S-PLUS: Insightful Corporation

SPSS, SYSTAT, BMDP, SigmaStat: SPSS Inc.

Stata Corporation - integrated statistical package for Windows, Macintosh, and Unix, designed for research professionals

Symynet:educational Software - Interactive computer software for biostatistics, sociometrics, quantitative psychology, statistics & math