Social bookmarking sites are a popular way to store, classify, share and search links through the practice of folksonomy (an Internet-based information retrieval methodology consisting of collaboratively generated, open-ended labels that categorize content such as Web pages, online photographs, and Web links) techniques on the Internet.

This list was originally from www.feedbus.com/bookmarks but I've added more to it, and I encourage you to do the same.

Please note: This is not for people to submit links to their hubs or websites, strictly social bookmarking sites only.

1. Stumble Upon
2. Lensroll.com
3. del.icio.Us
4. Digg.com
5. BlinkList
6. http://www.twitter.com/
7. Technorati
8. Gather
9. Ma.gnolia.com
10. Newsvine/

11. Netscape.com
12. Blogmarks.net
13. Cutulike.org
14. Furl
15. HubPages
16. Bluedot.us
17. Clipmarks
18. Ning
19. Simpy
20. Squidoo

21. Spurl.net
22. Wink
23. MyWeb Yahoo
24. Zlitt
25. Rollyo: Roll your search engine
26. PlugIM
27. iLike
28. BibSonomy
29. Blabb
30. Bookmark-Manager

31. Backflip
32. Aboogy
33. A1-WebMarks
34. Connotea
35. Google Bookmarks
36. Kaboodle
37. MindDeposit
38. LiveFavorites
39. RawSugar
40. Rojo

41. Shadows
42. Icerocket
43. Spotback
44. Askville
45. BlinkBits
46. Band Buzzer
47. BlinkPro
48. Bookmark Buddy
49. Blogmemes
50. BookMark Commando

51. Sync2It
52. BuddyMarks
53.Bookmark Magic
54.BookmarkTracker
55.Butterfly-
56.bookmax.net
57.C2NN
58.claimID
59.Clickmarks
60.Connectedy

61. del.lirio.us
62. Socail Anotation
63. Easybookmarks
64. Dogear
65. Dohat
66. freelink.org/
67. Frassle
68. Finety
69. Complore
70. GlobusPort

71. fungow
72. Guicookies
73. GetBoo
74. Humdigg
75. Dude Check This Out
76. hamiltontechgroup.com
77. i89.us
78. HyperLinkomatic
79. iFaves
80. ikeepbookmarks.com/

81. Jots
82. kmfavorites.com/
83. Linkroll
84. links2go - Targetted Directory
85. favmark
86. favoor
87. LinkGogo Society
88. Linksnarf
89. Lookmarks
90. Markaboo

91. Link2Mark
92. Mobleo.net
93. murl.com/
94. Lounge
95. memFrag
96. WaveRight
97. myHq
98. My BookMarks
99. myhotlist.com
100. My Bookmark Manager

101. linkatopia.com
102. mywebdesktop.net
103. My Link Vault
104. Netvouz
105. OnlineBookmark
106. PeerMark
107. openBM
108. Philippine Bookmarks
109. Powermarks
110. Riffs

111. Plug Web Edition
112. SearchFox
113. Shoppers Base
114. Shakk.us
115. Searchles
116. Share Your Links
117. Scuttle
118. SiteJot
119. Smarking
220. SiteBar

121. StartAid
122. Sports slister
123. socialbookmarking.org
124. an.geli.ca
125. Smelis.com
126. URL Blaze
127. Unalog
128. URLex
129. Taggly
130. SyncOne

131. Whitelinks.com
132. Wists
133. What link
134. Weeb-Feeds
135. womcat.org
136. World Wide Wisdom
137. wobblog.com
138. wURLdBook
139. yourMarks
140. zurpy

141. Zoogim.com
142. lilisto
143. Spotplex.com
144. SpotBack
145. CoRank
146. Openserving
147. TagTooga
148. 30DayTags
149. plime
150. Sphere

151. Mog
152. Vimeo
153. NewsWeight
154. Reddit
155. CrowdFound
156. Starton
157. GaddiPosh

If you have any suggestions or site to be added then reply here
or mail me..

Thanks

Nice list and Great Job buddy, Thanks for sharing.
Let me share you one more link which helps the readers of your blog.

List of Social Bookmarking Websites

..and if your blog is in Hindi Language, there is very good website http://blogvani.com It is the best aggregator I have seen.

this is a great list, if i can submit finish, i think will be great...

Nice blog, thanks for sharing SEO tips.

I post social networks on http://twitter.com/affiliatebin as I find them, and I have posted a link to this List of Social Bookmarking Websites.

thanks!

Very comprehensive list.. thanks. Is there any tool out there to help submitting to all these sites?

SaveFewBucks.Blogspot.com

http://www.soft3000.com
shareware and freeware downloads