I know you are looking always in online some do follow social bookmarking sites, here I collected some of them.
Here’s a list with PR:
1. Folkd.com [V] (7)
2. Oneview.com (German) (7)
3. Spurl.com (6)
4. Feedmarker.com (6)
5. LinkaGoGo.com (5)
6. SpotBack.com (5)
7. Connectedy.com (5)
8. Blinklist.com [V] (5)
9. MyLinkVault.com (4)
10. A1 Webmarks.com (4)
11. OYAX.com (4)
12. Pixelmo.com [V] (4)
13. TeDigo.com (2)
14. MyPIP.com (3)
15. SyncOne.com (3)
16. Yattle.com (3)
17. Memfrag.com (3)
18. Ziki.com [V] (1)
19. i89.com (0)
20. Chipmark.com (0)
And some of them I didn’t check the PR!
but they are DoFollow Social Bookmarking sites.
http://www.tagza.com/
http://www.oyax.com/
http://www.furl.net/
http://www.feedmarker.com/
http://www.folkd.com/
http://www.givealink.org/
http://www.mister-wong.com/
http://www.mixx.com/
http://myweb.yahoo.com/
http://www.11870.com/
http://www.blogmarks.net/
http://slashdot.org/bookmarks/
http://www.searchles.com/
http://www.fuzzfizz.com/
http://www.kapely.net/
http://www.bibsonomy.org/
http://www.spurl.net/
http://www.unalog.com/
http://www.jumptags.com/
http://www.searchles.com/
http://www.plime.com/
http://www.bloghop.com/
http://www.mylinkvault.com/
http://www.clipclip.com/
http://www.diigo.com/
http://www.myvmarks.com/
http://www.complore.com/
http://www.onmylist.com/
http://www.kapely.net/
http://www.mypip.com/
http://www.syncone.net/
http://www.yattle.com/
http://www.faves.com/
http://www.backflip.com/login.ihtml
http://linkagogo.com/
http://mylinkvault.com/
http://www.connectedy.com/index.php
if you my post really help you then plz leave me a comment.
Thanks 