Following are the most popular social networking sites on the Web along with many innovators. There are many more, and sites emerge and wither away all the time. For more on social networking sites, see social networking site.


The Pioneers
www.myspace.com Largest site
www.friendster.com Young adults
www.facebook.com Originally students, then everyone
www.tagworld.com Tools to personalize/transfer content
www.tagged.com Teen groups


General Sites
www.cyworld.com Popular in South Korea
www.friendwise.com Friends and classmates
www.hi5.com Global reach
www.ning.com Create own social network
www.orkut.com Communities
www.plaxo.com Social-based PIM
www.pownce.com Friends and co-workers
www.xanga.com Large teen membership


Specialized
www.asmallworld.net Private - invitation only
www.bebo.com Students, popular in U.K.
www.classmates.com Students, military
www.geni.com Genealogy tracking
www.librarything.com Online book club
www.reunion.com Locate former friends/classmates
www.sixapart.com Blogging
www.socialdegree.com Blog about social networks


Business Oriented
www.adgabber.com Advertising/marketing
www.linkedin.com People networking
www.ryze.com People networking (rise up!)
www.sermo.com Licensed physicians
www.spoke.com Discover/contact people
www.xing.com People networking


Mobile/Cellphones
www.loopt.com Maps show where friends are
www.mocospace.com Meet people via cellphone
www.twango.com Media sharing
www.utterz.com Post to any blog or social site