Useful and Easily adopt,here is an list of Social Bookmarking Sites, Arranged as per their page rank.

SOCIAL BOOKMARKING 


                     
https://delicious.com/
8
http://www.stumbleupon.com/
8
http://www.citeulike.org/
8
http://www.newsvine.com/
7
http://deltasci.com/
6
http://www.balltribe.com/
6
http://www.earcon.org/
5
http://www.bizsugar.com
5
http://www.pusha.se/
5
http://esloantr9.com/
5
http://kisoko.com/
5
http://youmob.com/
4
http://factson37.com/
4
http://cywebtech.com/
4
http://www.hxbfj.com/
4
http://www.ejlhw.com/
4
http://www.xjygsy.com/
4
http://www.yjtst.com/
4
http://www.techsfordummies.com/
4
http://www.xinsf.info/
4
http://www.fivestarmerchantservices.com/
4
http://www.excesssolutions.net/
4
http://www.bustourconnect.com/
4
http://www.bdsdz.com/
4
http://www.jodohkita.info/
4
http://fwisp.com/
4
http://www.careep.org/
4
http://www.activaging.org/
4
http://www.bookmerken.de/
4
http://dupioneer.com/
4
http://www.linkagogo.com/
4
http://qqpipi.com/
4
http://midwestautismcenter.org/
4
http://www.pixador.net/
4
http://gardicanin.net/
4
http://jofrati.net/
4
http://cosap.org/
4
http://ticey.com/
4
http://www.newsmeback.com/
3
http://colegioclaret.org/
3
http://www.pesau.com/
3
http://milocalbuilder.com/
3
http://freeticketopen.com/
3
http://www.ecowas-int.org/
3
http://felmausa.com/
3
http://edictosonline.com/
3
http://www.pulsimo.com/
3
http://www.oregoncranberry.net/
3
http://url.org/
3
http://alplist.com/
3
http://www.yemle.com/
3
http://www.biolocator.org/
3
http://www.bb3b.com/
3
http://www.bookmark4you.com/
3
http://biolocator.org/
3