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, ....)
openBMD is a multi-platform desktop application for the transcription of Birth, Marriage and Death (BMD) index records as part of the FreeBMD project to transcribe the Civil Registration index for England and Wales.