WinFIT by Stefan Krumm. ConvX by Mark Bowden. PowderX by Cheng Dong. Distributed with Fortran sources. Install and test these programs, then, select those you prefer.
Most programs have manuals and even tutorials.
The course will try to honestly show the diversity of possible software. Thus, you cannot expect to obtain help for all software listed along the SDPD Internet Course, because the teachers cannot be familiar with all of them. Asking for help for a given software should be adressed to its author, after a careful reading of the manual. We do not expect from you here always an exact result, though this would be possible sometimes, but an estimation depending on the database completeness. Anyway, a maximum of 10 lines should suffice for giving this estimation for each exercise below.