Online Bookmarks Manager Social Bookmarking
https://reddit.com
Reddit is a source for what's new and popular online. reddit learns what you like as you vote on existing links or submit your own! 21digg / All
https://www.digg.com
Digg is all about user powered content. Every article or story on digg is submitted and voted on by the digg community. Share, discover, bookmark, and promote the news that's important to you! 32Add This! Social Bookmark and Feed Button - Web2.0 Social Media Optimization
https://addthis.com 38ShareThis: Share, Email, Tweet, Like, +1 Made Simple
https://sharethis.com 42https://sharethis.com/publishers/get-sharing-tools
Shareaholic - Share Button, Social Bookmark, Sharing Plugins and Module.
https://www.shareaholic.com 47
Drew Curtis' FARK.com
https://www.fark.com 46Slashdot
https://slashdot.org 42ShoutWire
https://www.shoutwire.com 53BlogMarks - Public Marks
https://blogmarks.net 54Diigo
https://diigo.com
Social Annotation: Seamless Integration of Social Bookmarking, Web Highlighter, Sticky-Note & Clipping. Killer features for finding, managing and sharing online information. A powerful personal tool and a rich social platform. 54BibSonomy
https://www.bibsonomy.org
For sharing bookmarks and lists of literature. 51
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