1. https://delicious.com/
2. http://www.bizsugar.com/
3. http://www.reddit.com/
4. https://www.diigo.com/
5. http://buddymarks.com/
6. http://www.designfloat.com/
7. http://www.bibsonomy.org/
8. http://www.newsvine.com/
9. http://blinklist.com/
10. http://www.bookmarkgroups.com/
11. http://www.social-bookmarking.net/
12. http://www.thinmarker.com/
13. http://www.jumptags.com/
14. http://www.stumbleupon.com/
15. http://developersniche.com/
16. http://www.topsocial.info/
17. http://www.bruher.com/
18. http://www.indofeed.com/
19. http://www.bookmarkgolden.com/
20. http://www.bookmarkeasy.net/
21. http://digg.com/
22. http://slashdot.org/
23. http://www.fark.com/
24. http://www.folkd.com/
25. http://www.pusha.se/
26. http://www.nettraject.com/
27. http://prmsp.net/
28. http://www.zbookmarking.com/
29. http://www.tumblr.com/
30. http://pinterest.com/
31. http://www.so.cl/
32. http://www.votetags.info/
33. http://linkagogo.com/
34. http://jb3shows.com/
35. http://sfcsf.org/
36. http://mimideluxe.info/
37. http://www.plurk.com/
38. http://tagza.com/
39. http://stageslink.com/
40. http://linkarena.com/
41. http://cloudytags.com/home.html
42. http://www.newsmeback.com/
43. http://www.bookmark4you.com/
44. http://www.kojaxx.com/
45. http://www.startaid.com/
46. http://www.sitejot.com/
47. http://youmob.com/
48. http://www.stumpedia.com/
49. http://www.squidoo.com/
50. http://www.dropjack.com/
51. http://ilinking.org/
52. http://www.lintas.me/
53. http://eggig.com/
54. http://fwisp.com/