【图书】

- Americabookshelf.com
- BooksConnect
- BookCrossing.com
- Bookhopper.co.uk
- Bookins.com
- BookMooch.com
- Booksalescout.com
- Bookswim.com
- ConnectViaBooks
- GoodReads
- PaperBackSwap.com
- Pazap.com
- Read It Swap It
- Revish



- Shelfari
- Socialbib

【商务与个人】



- AdvisorGarage
- ArtBreak
- Blogtronix
- Commutal
- CompanyLoop
- ConnectBeam
- Decorati
- DoMyStuff
- Doostang
- Fast Pitch
- iKarma Inc.
- ImageKind
- Jambo
- Jigsaw
- Konnects
- Lawyrs
- Linkedin
- mediabistro.com
- Pairup.com
- Ryze.com
- Spoke.com
- Visible Path
- WebCrossing Neighbors
- XING

【家庭】



- Amiglia
- CafeMom
- Cingo
- CommonGate
- Family 2.0
- Famiva
- Famster
- Geni.com
- Genoom



- Kincafe
- Kinzin
- MayasMoM
- Minti
- MomJunction
- MothersClick
- myfamily.com
- OneGreatFamily.com
- OurStory.com
- Parentography
- The Family Post

【交友】



- 43 Things
- Amitize.com
- aSmallWorld
- Badoo.Com
- Bebo
- Eons
- Facebook.com
- Faceparty
- Flingr
- Friendster
- hi5
- Lovento



- Multiply.com
- Mycool
- MySpace.com
- NetFriendships.com
- Netlog
- Orkut
- Passado
- Piczo
- Plazes
- Pownce.com
- ProfileHeaven.com
- reunion.com
- Vox.com
- Xanga
- XuQa

【业余爱好与兴趣】



- ActionProfiles.com
- Arts community
- BeGreen
- beRecruited
- BottleTalk
- CarGurus
- Change
- ChangingThePresent
- ChickAdvisor
- CircleUp
- Coastr



- ColShare
- coRank
- DailyStrength
- Dundoo
- Flixster
- FuelEmpire
- GirlSense
- Greenvoice
- iYomu
- Motortopia
- MyCatSpace
- MyDogSpace
- Uniteddogs
- vSocial

【语言】

《70 余款在线语言社区与资源》

【Media (Photo, Video & Audio)】

《超过 150 个在线视频工具与资源》
《超过 90 个在线图片编辑工具与资源》
《90 多个必不可少的音乐视听网站》
- Buzdeo
- Fotki
- Fotolog

【音乐】



- Asoboo
- BandChemistry
- BandWagon
- CrackSpace
- Moob
- MOG

【Mobile】



- CrackBerry
- Dodgeball
- Friendstribe.com
- GotZapp
- Groovr
- Jaiku
- Loopt
- Mixxer
- Mobango
- Mozes
- Partysync
- Peepsnation
- Rabble
- Socialight
- Wattpad

【购物】



《18 个社会化购物和交易网站》
- 3LUXE
- AgentB
- bringsome.com
- boxedup.com
- CoWorkersAds
- iliketotallyloveit.com
- MyItThings.com
- MyStore.com



- Productwiki.com
- RedFlagDeals.com
- Sale Grab
- Shoppero
- Smashing Darling

【社会化书签】

《50 余款社会化书签应用》

【学生】



- AlumWire
- B4Class
- Campusbug
- CampusRank
- College.com
- CollegeMedium.com
- College Tonight
- DormItem.com



- Graduates.com
- Half.com
- iHipo
- LocalSchools
- Pazap.com
- Quizilla
- RateMyProfessor.com



- Student.com
- Studentbid.com
- StudentSN.com
- Uloop.com

【旅游与本地信息】



- Amicoz.com
- Citizenbay
- CityTherapy
- CouchSurfing
- fatdoor.com
- Going.com
- iloho
- MatchActivity
- Matador
- myTripbook.com
- OurFaves
- Outside.in
- Rummble



- TravBuddy
- Travellerspoint
- TravelTogether
- tribe.net
- TripUp
- Triporama
- VibeAgent



- WAYN
- WeExplore
- Wikitravel
- Zoodango

(via Mashable)