Below are links to various statistical software packages:

• SAS homepage

Downloadable SAS macros

• S-Plus homepage

• R homepage

• Stata homepage

• BUGS (Bayesian inference Using Gibbs Sampling) homepage

• Joe Schafer's MI (Multiple Imputation) programs

• IVEware: accommodates complex sample design data and multiple imputation

• Various programs to obtain correct inference under complex survey sample designs

• Other free statistics software