GNU R package for survival analysis

 This package provides functions and datasets for survival analysis:
 descriptive statistics, two-sample tests, parametric accelerated failure
 models, Cox model. Delayed entry (truncation) is allowed for all models;
 interval censoring for parametric models.
 .
 This package is part of the set of packages that are 'recommended'
 by R Core and shipped with upstream source releases of R itself.