List of social networking sites

A list of Social Media Sites.

Everybody knows the big Social Media Sites such as #Facebook, #Twitter, #LinkedIn, #Reddit or #Instagram, but there are MANY smaller Sites catering for specific Topics.

If you are following a specific topic or are interested in a certain Niche Industry, there might be a Social Network for your Interest.
This list is by all means  exhaustive. If you know of any other Social Media Networks which should be included here please leave a Comment We will add it if suitable. (This list does not contain Dating Social Media Sites.)
(more hyperlinks will be added soon)

NameDescription / FocusRegistration
Academia.eduSocial networking site for academics/researchersOpen
About.meSocial networking siteOpen
AsianAvenueA social network for the Asian American communityOpen
aSmallWorldEuropean jet set and social elite worldwideInvite-only
AthlinksRunning, swimmingOpen
Audimated.comIndependent musicOpen
BeboGeneralOpen to people 13 and older
Biip.noNorwegian communityRequires Norwegian phone number
BlackPlanetBlack AmericansOpen
BusuuLanguage learning community (headquartered in Madrid, Spain)Open
BuzznetMusic and pop-cultureOpen
CafeMomMothersOpen to moms and moms-to-be
Care2Green living and social activismOpen
CaringBridgeNot for profit providing free websites that connect family and friends during a serious health event, care and recovery.[26]Open to people 18 and older[28]
Classmates.comSchool, college, work and the militaryOpen to people 18 and older[31]
CloobGeneral. Popular in IranOpen
CommongroundEnvironmental and property due diligence professionalsOpen
CouchSurfingWorldwide network for making connections between travelers and the communities they visit.Open
CozyCotEast Asian and Southeast Asian womenOpen
CrunchyrollAnime and forums.Open
CucumbertownNetworking for cooksOpen
CyworldGeneral. Popular in South Korea.Open
DailyStrengthMedical & emotional support community - physical health, mental health, support groupsOpen
deliciousSocial bookmarking allowing users to locate and save websites that match their own interestsOpen
DeviantArtArt communityOpen to people 13 and older
Diaspora*Decentralized, user-owned, open source, nonprofit, privacy aware, generalOpen
DisaboomPeople with disabilities (amputees, cerebral palsy, MS, and other disabilities)Open
Dol2dayPolitic community, social network, Internet radio (German-speaking countries)Open
DontStayInClubbing (primarily UK)Open
Draugiem.lvGeneral (primarily LV, LT, HU)Invitation only
doubanChinese Web 2.0 website providing user review and recommendation services for movies, books, and music.Open
DoximityU.S. Physicians and medical doctors.U.S. physicians only
DXY.cnChinese online community for physicians, health care professionals, pharmacies and facilitiesOpen
ElftownCommunity and wiki around fantasy and sci-fi.Open, approval needed
ElloGeneralInvite only while in beta
ElixioBusiness executives jet set and global elite.Invite-only
English, baby!Students and teachers of English as a second languageOpen
Eons.comFor baby boomers and mature internet users age 40 and beyond.Open to people age 40 years and older
eToroSocial investing, financeOpen
Experience ProjectLife experiencesOpen
FacebookGeneral: photos, videos, blogs, apps.Open to people 13 and older
FetlifePeople who are into BDSMOpen to people "of legal age to see adult content"
FilmAffinityMovies and TV seriesOpen
FilmowMovies and TV seriesOpen
FledgeWingEntrepreneurial community targeted towards worldwide university studentsOpen to university students
FlixsterMoviesOpen to people 13 and older
FlickrPhoto sharing, commenting, photography related networking, worldwideOpen to people 13 and older (Yahoo! Login)
Focus.comBusiness-to-business, worldwideOpen to people 13 and older
FotkiPhoto sharing, video hosting, photo contests, journals, forums, flexible privacy protection, friend's feed, audio comments and unlimited custom design integration.Open
FotologPhotoblogging. Popular in South America and SpainOpen
FoursquareLocation based mobile social networkOpen
FriendicaDistributed, federated, privacy aware, open source, generalOpen
FuelmyblogBlogging communityOpen
FyuseA spatial photography app and website which lets users capture and share interactive 3D images.Open
Gab.aisocial networking service created as an alternative to social networks like Facebook, Twitter and Reddit.Open
Gaia OnlineAnime and games. Popular in United States, Canada and Europe. Moderately popular around Asia.Open to people 13 and older
GamerDNAComputer and video gamesOpen
Gapyear.comTravel social networkOpen
Gather.comArticle, picture, and video sharing, as well as group discussionsOpen
Gays.comSocial network for LGBT community, guide for LGBT bars, restaurants, clubs, shoppingOpen, global
Geni.comFamilies, genealogyOpen
GentlemintCommunity for sharing and discussing all things manlyOpen
GetGlueSocial network for entertainment.Open
GirlsAskGuysCommunity where people help each other by sharing their experiences & opinions.Open
GogoyokoFair play in music - social networking site for musicians and music lovers.Invite only while in beta
GoodreadsLibrary cataloging, book lovers.Open
GoodwizzSocial network with matchmaking and personality games to find new contacts. Global, based in France.Open
Google+GeneralOpen to people 13 and older [120]
GovLoopFor people in and around government.
GrindrFor gay and bisexual men.[122]Open
HabboGeneral for teens. Over 31 communities worldwide. Chat room and user profiles.Open to people 13 and older
hi5General. Popular in Nepal, Mongolia, Thailand, Romania, Jamaica, Central Africa, Portugal and Latin America. Not very popular in the United States.Open to people 13 and older.
Hospitality ClubHospitalityOpen
HotlistGeo-social aggregator rooted in the concept of knowing where users' friends are, were, and will be.Open
HR.comSocial networking site for human resources professionals.Open
Hub CultureGlobal influencers focused on worth creation.Invite-only
IbiboTalent-based social networking site that allows users to promote themselves and discover new talent. Most popular in India.Open
Identi.caTwitter-like service popular with hackers and software freedom advocates.Open
Indaba MusicOnline collaboration for musicians, remix contests, and networking.Open, global
InfluensterOnline product sampling and review platform.Open, global
InstagramA photo and video sharing site.Open to anyone 13 or older
IRC-GalleriaFinlandOpen to Finnish speaking people 12 and older
italkiLanguage learning social network. 100+ languages.Open, global
ItsmyMobile community worldwide, blogging, friends, personal TV-shows
JaikuGeneral. Microblogging. Owned by GoogleOpen to people 13 and older
JiepangLocation-based mobile social network. In Chinese languageOpen
Kaixin001General. In Simplified Chinese; caters for mainland China usersOpen to the general public
KiwiboxGeneral.Open to people 13 and older
LaiBhaariMarathi social networkingOpen
Late Night ShotsMessage boards, member profile pages, spotting other membersInvite-only
LibraryThingBook loversOpen to people 13 and older
LifeknotShared interests, hobbiesOpen to people 18 and older
LinkedInBusiness and professional networkingOpen to people 14 and older[168]
LinkExpatsSocial networking website for expatriates. 100+ countries.Open, global
ListographyLists. AutobiographyOpen
LiveJournalBlogging. Popular in Russia and among the Russian-speaking diaspora abroad.Open (OpenID)
LivemochaOnline language learningOpen
Meetup (website)General. Used to plan offline meetings for people interested in various activitiesOpen to people 18 and older
MeetthebossBusiness and finance community, worldwide.Open
MillatFacebookGeneral, created in response to Facebook [180]Open
MindsFree, open source, decentralized, and based on a foundation of transparency and privacyOpen
MocoSpaceMobile community, worldwideOpen to people 14 and older
MOGMusicOpen to people 14 and older
MouthShut.comSocial network, social media, consumer reviewsOpen
MubiAuteur cinemaOpen
MyHeritageFamily-oriented social network serviceOpen
MyspaceGeneralOpen to ages 13 and older.
Nasza-klasa.plSchool, college and friends. Popular in PolandOpen
NexopiaCanadaOpen to people 13 and older [201]
NingUsers create their own social websites and social networksOpen to people 13 and older
OdnoklassnikiConnect with old classmates. Popular in Russia and former Soviet republicsOpen
Open DiaryFirst online blogging community, founded in 1998Open to people 13 and older
OUTeverywhereGay/LGBTQ communityOpen
PatientsLikeMeOnline community for patients with life-changing illnesses to find other patients like them, share their data with others, and learn more about their condition to improve their outcome.Open to people 13 years and up
PartyflockDutch virtual community for people interested in house music and other electronic dance music.Open to people 18 years and up
PingstaCollaborative platform for the world's internetwork expertsInvite-only, only Internet experts
PinterestOnline pinboard for organizing and sharing things you loveOpen
PlayfireComputer and video gamesOpen to people 13 and older
Playlist.comGeneral, musicOpen to people over 13
PlurkMicro-blogging, RSS, updates. Very popular in TaiwanOpen
PoolwoSocial networking site from IndiaOpen
QuoraQuestions and answersOpen
QzoneGeneral. In Simplified Chinese; caters for mainland China usersOpen to the general public
RaptrVideo gamesOpen
RavelryKnitting and crochetOpen
RenrenSignificant site in China. Was known as 校内 (Xiaonei) until August 2009.Open
ReverbNation.comSocial network for musician and bandsOpen to people 16 and older
Rooster TeethSocial network and community siteOpen to people 13 and older
ScienceStageScience-oriented multimedia platform and network for scientistsOpen
ShareTheMusicMusic community. Sharing and listening to music free and legallyOpen
Sina WeiboSocial microblogging site in mainland China.Open
SkoobCollaborative social network for Brazilian readersOpen
SkyrockSocial network in French-speaking worldOpen
SocialVibeSocial network for charityOpen
Sonico.comGeneral. Popular in Latin America and Spanish and Portuguese speaking regions.Open to people 13 and older
SoundCloudRepository of original music pieces and networking.Open
SpacesRussian social network targeted to mobile phone usersOpen
Spot.IMA service for webmasters to add social networking functionality to their websitesOpen
Spring.meSocial network for meeting peopleOpen to people 13 and older
Stage 32US-based social network and educational site for creative professionals in film, television and theater
StreetlifeUK based. Links members according to where they liveOpen
StudiVZUniversity students, mostly in the German-speaking countries. School students and those out of education sign up via its partner sites schülerVZ and meinVZ.Open
Students Circle NetworkA social network connecting students, teachers and institutions to course resources, study groups and learning spaces.Open
StumbleUponStumble through websites that match users' selected interestsOpen
TalkbiznowBusiness networkingOpen
Taringa!General (primarily Argentina)Open to people 13 and older
TermWikiLearning / languages / translation - 1.2 million terms in more than 1300 subjectsOpen
The SphereA private online social luxury network with exclusive personalized servicesInvite-only
Trombi.comFrench subsidiary of
TuentiSpanish-based university and high school social network.Open
TumblrMicroblogging platform and social networking website.Open
TwitterGeneral. Micro-blogging, RSS, updatesOpen to all ages [286]
TyltedMobile social game network[288]Open to people 14 and older
UntappdBeer check-in social network.[291]Open
VKGeneral, including music upload, listening and search. Popular in Russia and former Soviet republics.Open
Vampirefreaks.comGothic and industrial subcultureOpen to users 13 and over
ViadeoGlobal social networking and campus networking available in English, French, German, Spanish, Italian and PortugueseOpen
VirbSocial network that focuses heavily on artists, including musicians and photographersOpen
WattpadFor readers and authors to interact and e-book sharingOpen
WAYNTravel and lifestyleOpen to people 18 and older
WeeWorldTeenagers - 9 to 17Open to ages 10 and older.
We Heart ItImage-based social network focused on inspiration, expression and creativityOpen
WellwerCommunity without borders, where sharing is everything.Open to people 13 years and older
WooxieBlogging and micro-bloggingOpen
WriteAPrisoner.comSite networking inmates, friends, familyOpen to people 18 years and older
XangaBlogs and "metro" areasOpen
XINGBusiness (primarily Europe (Germany, Austria, Switzerland))Open
Xt3Catholic social networking, created for World Youth Day 2008Open
YammerSocial networking for office colleaguesMust have company email
Yelp, Inc.Local business review and talkOpen
Zoo.grGreek web meeting pointOpen