Here is the list of 100 Social Bookmarking sites.

1. http://www.gravee.com/
2. http://www.backflip.com/dir_start.ihtml
3. http://www.blinklist.com/
4. http://bluedot.us/friends/dots
5. http://www.blogmemes.net/
6. http://del.icio.us/
7. http://de.lirio.us/
8. http://www.diigo.com/
9. http://www.furl.net/
10. http://www.looklater.com/
11. http://www.markaboo.com
12. http://ma.gnolia.com/
13. http://www.rawsugar.com/index.faces
14. http://www.shadows.com/
15. http://www.simpy.com/
16. http://www.spurl.net/
17. http://www.igooi.com
18. http://www.hanzoweb.com
19. http://www.tagtooga.com/db.tag
20. http://wink.com/
21. http://www.digg.com/
22. http://www.ekudos.nl/
23. http://www.complore.com/
24. http://www.tallstreet.com/
25. http://indiagram.com/index.php
26. http://www.goesby.com/
27. http://www.portachi.com/
28. http://www.a1-webmarks.com/
29. http://www.tektag.com/
30. http://www.wirefan.com/
31. http://www.linkatopia.com/
32. http://www.optimiz.us/
33. http://www.linklog.nl/
34. http://www.wykop.pl/
35. http://www.blogmarks.net/
36. http://reddit.com/
37. http://www.connotea.org/
38. http://www.listible.com/
39. http://www.kaboodle.com/
40. http://www.wists.com/
41. http://otavo.com/
42. http://clipclip.org/
43. http://www.citeulike.org/
44. http://www.i89.us/
45. http://www.smarking.com/
46. http://www.indiamarks.com/
47. http://www.meme-stream.com/
48. http://www.tabmarks.com/
49. http://www.zurpy.com/
50. http://clipmarks.com/
51. http://www.linkagogo.com/
52. http://www.bookkit.com/
53. http://www.lilisto.com/
54. http://www.feedmarker.com/
55. http://feedmelinks.com/portal
56. http://www.bmaccess.net/
57. http://www.linkologia.pl/
58. http://segnalo.alice.it/?
59. http://www.lookmarks.com/
60. http://www.30daytags.com/fresh
61. http://imp.etuo.us/
62. http://www.librarything.com/
63. http://www.linkblog.com.br
64. http://www.oyax.com/
65. http://www.urlex.info/
66. http://www.web-feeds.com
67. http://www.bloghop.com/
68. http://www.browsr.com/
69. http://www.bookmarktracker.com/
70. http://buddymarks.com/
71. http://www.butterflyproject.nl/
72. https://www.chipmark.com/Main
73. http://www.connectedy.com/
74. http://ez4u.net/
75. http://freelink.org/
76. http://www.fungow.com
77. http://ww2.ikeepbookmarks.com/
78. http://www.mobleo.net/
79. http://www2.myhq.com/
80. http://www.mylinkvault.com/
81. http://www.mypip.com/home/
82. http://www.myvmarks.com
83. http://www.pixelmo.com/
84. http://www.searchles.com/
85. http://www.shoppersbase.com/
86. http://www.sitejot.com/
87. http://www.syncone.net/
88. http://www.startaid.com
89. http://www.zoogim.com/
90. http://bwsmith.com
91. http://aboogy.com
92. http://socialbookmarkingsite.com/
93. http://www.putvote.com
94. http://www.tagcloud9.com/
95. http://kinja.com
96. http://www.technorati.com
97. http://www.ambedo.com/
98. http://www.icio.de/
99. http://www.favoriting.com
100. http://www.corank.com/