Geni
Geni is the first social network driven by familial relationships.
Geni’s product has been a huge hit, with more than 15 million users on its genealogical website and over 60 million profiles. The site was selected as a 2007 CNET Webware 100 Winner, PC Magazine’s 2008 Best Free Software, and one of Time Magazine’s 2008 50 Best Websites.