!Family: BASIC program to maintain a family tree. Uses the worldwide standard GEDCOM file format to store information.
Ancestor+: A commercial application to help keep track of your family tree. Originally written by the late Graham Crowe, it is now being maintained by Paul Vigay and sold by APDL.
GedcomWeb: Converts GEDCOM files into Javascript data suitable for publication on the web.
Roots: Written by Alex Waugh, this low-cost shareware program allows you to keep track of your family tree in a graphical format.