Gramps, the open source genealogy program
Gramps is a genealogy program for Linux, Windows, Mac, and FreeBSD that allows you to easily build and keep track of your family tree. It supports the GEDCOM standard, allows fine grained privacy controls and can generate many different types of reports (descendant trees, graphs, connection diagrams, ....)
PhpGedView is a revolutionary genealogy program which allows you to view and edit your genealogy on your website. It has full privacy functions, can import from GEDCOM files, and supports multimedia. It also simplifies family collaboration.
Java Extensible Genealogy program
Ancestris is a genealogy program written in Java. It works under any operating system, Windows, Linux, MacOS. Ancestris is developed under GNU General Public License. Ancestris is a genealogy software that closely respects the GEDCOM 5.5 standard which will allow you to work on files that are reliable and that you can exchange and share without losing data. In addition to the editors (Ancestris comes with two editors: a GEDCOM editor and a standard one), it offers many views like tree view, geographic view, chronological view, browsers, tables: individuals, families, etc.. and numerous reports. It offers an opportunity to expand its capabilities and adapt it to your needs and desires thanks to plugins.