Gramps - Research, organize and share your family tree with Gramps genealogy software.
MyHeritage - MyHeritage is a family-oriented social network service and genealogy website.
Ancestry - Discover your family history and start your family tree.
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.
6 Groups - The king of organigrams, family trees, and collaborative tools
WikiTree.com - The WikiTree community is growing a free worldwide family tree. The site is 100% free.