Agelong Tree is a computer program intended for building family trees, storing and displaying information about people and events in their lives. Agelong Tree has a wide spectrum of features: it automatically builds a family tree for any person, has a mechanism of events allowing the user to make complex biographies, stores texts, photos, sounds and videos, searches, sorts and filters data and shows statistics.

Version 3.1 adds Italian, Dutch, German and Galician interface languages.