ASURV (Astronomical SURVival Statistics) provides astronomy survival analysis for right- and left-censored data including the maximum-likelihood Kaplan-Meier estimator and several univariate two-sample tests, bivariate correlation measures, and linear regressions. ASURV is written in FORTRAN 77, and is stand-alone and does not call any specialized libraries.
Please cite one of the following: http://adsabs.harvard.edu/abs/1985ApJ...293..192F, http://adsabs.harvard.edu/abs/1986ApJ...306..490I, or http://adsabs.harvard.edu/abs/1990BAAS...22..917I