geneweb

Geneweb allows keeping track of ancestral data. It is a powerful system for maintaining a set of data about your family history. It supports much of the GEDCOM tag system for data storage, and can be used either as your primary system for archiving genealogical data, or as a web service (through a CGI interface) for publishing your data for others to use. Geneweb is under active use and development, so its feature set is constantly improving. It already boasts features not found in most off-the-shelf products, such as consanguinity and relationship calculations, as well as other statistical analysis tools.