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[Name]: CiteULike
[Description]: A web service which allowed users to save and share citations to academic papers.
(Defunct sites) -
[Name]: Simpy
[Description]: formerly de.lirio.us
(Defunct sites) -
[Name]: Faves
[Description]: as of January 2012, the service is no longer active.
(Defunct sites) -
[Name]: Twine
[Description]: Twine existed from 2007 to 2010. Now shut down.
(Defunct sites) -
[Name]: Furl
[Description]: web page clipping and archiving service, founded in 2003 and acquired by Diigo in 2009.
(Defunct sites) -
[Name]: Newsvine
[Description]: Owned by NBC, Community-powered which host content from its users and syndicated content. Discontinued on October 1, 2017, redirected to NBCNEWS web page
(Defunct sites)
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