Functions mainly for computations related to Kolmogorov-Smirnov tests, including distribution function, quantile function and simulation from the Lilliefors distribution for exponentiality and similar utilities for the Kolmogorov distribution.
I used this package in teaching a statistics course (Practical Statistics I). Most of them were written around 2008-2010 (with minimal maintenance since) and for many of them there are probably better alternatives today. The names predate the namespaces and mostly start with “psi.”, to make it immediately clear that they are from this package.