Suggestion for some of the good websites for Social Bookmarking:
Tumblr.com
Scoop.it
Pearltrees.com
Reddit.com
Instapaper.com
Wikitechguru.com
Bloglovin.com
Only2clicks.com
Diigo.com
Ttlink.com
Kinja.com
Getpocket.com
Mix.com
Ello.co
Plurk.com
Minds.com
Bagtheweb.com
Evernote.com
Trello.com
Start.me
Papaly.com