Sean Parker | Facebook

image credit: jdlasica/FlickrSean Parker was born on December 3, 1979. Parker co-founded Napster in 1999 with Shawn Fanning. In November 2002 he co-founded Plaxo, an online address book and social networking service that integrated with Microsoft Outlook. He co-founded the advocacy and fundraising application Causes within Facebook in 2007. Parker was also President of Facebook. He joined the venture capital fund Founders Fund in 2007 as Managing Partner.