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Thanks to sharing all post i really like all post. Every post is really very nice for social bookmarking site all site is really very useful.

http://www.bloggersideas.com/new-best-high-pr-do-follow-social-bookmarking-sites/

This website is very best social bookmarking site list with do follow and high PR.

https://www.reddit.com/
http://www.scoop.it/
http://www.plurk.com/top/
https://www.diigo.com/
http://digg.com/
http://delicious.com/
http://www.folkd.com/
http://youmob.com/
http://url.org/...

Delicious, Reddit, StumbleUpon, Diggo, Slashdot, Newsvine, Youmb, url.org