Gramps - Research, organize and share your family tree with Gramps genealogy software.
Ancestry - Discover your family history and start your family tree.
webtrees - webtrees - the web based Family History Software - is based on the popular PhpGedView ('PGV') application.
WikiTree.com - The WikiTree community is growing a free worldwide family tree. The site is 100% free.
Family Echo - Draw your printable family tree online. Free and easy to use, no login required. Add photos and share with your family. Import/export GEDCOM files.
Ahnenblatt - Ahnenblatt is genealogy software for Windows. (Use Portable Version for Linux with Wine)