Survival Kit, software/Other possibilities

The reader should be aware of the fact that the Survival Kit is not the only software for survival analysis. The other choices are including (but not limited to) these programs

coxph / coxme
These packages are available in R. Coxph is used for cox models, coxme for cox models including random variables. These are free programs.

frailtypack
Again a free package available in R. The advantage of this is the ability to estimate two correlated random effects.

SAS
Proc phreg and proc lifetest can be used in SAS after purchase of its license.