Free Social Bookmarking Site

Are you looking for Social Bookmarking Sites for free? Here I will give some Social Bookmarking sites for you. I hope this information is useful for you.
1. http://furl.net/
2. http://blinklist.com/
3. http://www.mister-wong.com/
4. http://spurl.net/
5. http://diigo.com/
6. http://backflip.com/
7. http://bibsonomy.org/
8. http://linkagogo.com/
9. http://myjeeves.ask.com/
10. http://buddymarks.com/
11. http://www.connectedy.com/index.php
12. http://www.mylinkvault.com/
13. http://www.jumptags.com/
14. http://www.oyax.com/
15. http://www.a1-webmarks.com/
16. http://www.bookmarktracker.com/bt/home
17. http://www.myvmarks.com/
18. http://smaknews.com/
19. http://www.dizzed.com/
20. http://izeby.com/
21. http://www.healthranker.com/