ESBPDF Analysis 

ESBPDF Analysis provides everything needed for using Discrete and Continuous Probability Distributions in a single application, handling all the Probability Combinations for you with Graphing and info. Designed for Windows - optimised for Windows XP
probability probability analysis probability software normal binomial poisson distributions mathematics calculator statistics lognormal chi-squared

WINKS, Windows KWIKSTAT 

WINKS makes statistical data analysis understandable and easy to perform for the researcher, student, or scientist. Award-winning statistics program with thousands of users in over 65 countries.
kwikstat statistics math graph science analysis regression correlation t-test mean spss calculate database data

Analyse-it for Microsoft Excel 

Analyse-It for Excel: General Statistics brings statistical analysis to Microsoft Excel 95, 97, 2000 and XP, with 14 parametric and 17 nonparametric procedures for descriptive statistics, testing normality, comparing groups, correlation, and regressi
statistics statistical data analysis software excel addin regression anova correlation minitab spss