Gramps (formerly GRAMPS, an acronym for Genealogical Research and Analysis Management Programming System) is a free and open source genealogy software. Gramps is programmed in Python using PyGObject. It uses Graphviz to create relationship graphs. The program is extensible such that, in addition to human family trees, it has been used to create animal pedigree charts as well as academic genealogy showing mentoring relationships between scientists, physicians, and scholars.