indexf is a C++ program that measures line-strength indices (not only the Ca II indices) in fully calibrated FITS spectra. If required, this program computes index errors resulting from the propagation of random errors (e.g. photon statistics, read-out noise) and estimates the effect of errors on radial velocity.

CaTffs is a FORTRAN program to predict the CaT*, CaT and PaT indices on the basis of the fitting functions for a given set of input atmospheric parameters. See more details in the README file.