Social Bookmarking is a very effective way of promoting your blogs/websites Here is a huge list of Social Bookmarking Icon Packs,(Most of which are provided for free with the Creative Commoms Licensing) designed by some of the best designers around..

1. Page Peel Social Icons – Version 2

2. Circular Social Media Icons

3. The Leaves Fall: A Social Icon Set For Bloggers

4. Heart – A Free Social Icon Set

5.Lighter Grey Icons

6. Subtle Grey Social Icons

7. Social Bookmark Iconset 1

8. Social Bookmark Icons Set  2

9. Insight Icons

10. Premium Social Media Icons

11. Socialize Icons

12. WebDev Social Bookmark

13. 60 Social Media Icons

14. Aquaticus.Social

15. Cheers – web 2.0 in a glass

16. Free Social Media Icons & 275 New Premium App Icons

17. Social icons vector set

18. Sky Blue White Pearl Icons

19. Elegancy speaks

20. Tabbed Social Media Icons

21. Social Icons –knobs

22. Web Social Icon Set

23. White Magik

24. Sleek Tab Style Icons

25. 20 Social Bookmarking Icons

26. webtoolkit4.me Icon Pack

27.Social Stamps

28. Set of Social Icons no.3

29. 3D Social Media Icons Ser 1

30. 3D Social Media Icons Set 2

31.Handycons 1

32. Handycons 2

33. Lontar Icons

34. Starry Site Icons

35. Drink Web 2.0

36. SocioLEGO

37.Social Balls

38. Social.me

39. Free Vector Social Bookmark Icons

40. Chococons

41. Free Vector – Social Icons

42. DelliCream and DelliCake

43. 108 Blue and White Pearl Social Bookmarking Icons

44. Location – Free Social Media Icon Set

45. Metal Social Icons

46. Beer Cap Social Icons

47. Christmas Social Bookmark Icons

48.Social Icons by Iconshock

49. Icontexto Inside

50. 3D Glossy Blue Orbs Social Media Icons

51. 108 Free Glossy Orange Orb Social Media Icons

52. (max)Icone Blog Set 1

53. (max)Icone Blog – Set 2

54. (max)Icone Blog – Set 3

55. Social Web Buttons – Set 1

56. Social Web Buttons – Set 2

57. 24 Free Exclusive Vector Icons: Handy

58. Wood Social Networking Icons

59. Social Icons Made of Wood

60. Woodgrain

61. Social Media Bookmark Icon +

62. Social Media Stars Icon Set

63. 34 Circular Social Icons

64. 40 Social Bookmark Icons for Your Blogs

65. Curly Vector Social Icons

66. Social Tube

67. Set of social icons by Tydlinka

68. Polaroid icon set

69. web 2.0 Icons

70. Chrome Icons

71. Social Charms – Pack 1

72. Social Charms – Pack 2

73. Cafe Icon Set

74. 6 New Social Icons

76. Social Media Mini Icon Pack

77. Social Icons in Black

78. Web 2.0rigami

79. Social Media Icons

80. Free Hand Drawn Doodle Icon Set for Bloggers

81. Bevel Dark Social Icons

82. Social Bookmark Sketchy Icons

83. Social Icons hand drawn

84. koidesign social icon pack

85. Social Icon stickers

86. Gorgeous Mini Social Networking Icon set

87. Cute Birdy Icons

88. Black n white- Social Media Icons Version 1.0

89. Elegant Social Media Icons Version 2.0

90. Nurture Social Icon Set

91. Social grunge icons

92. Extreme Grunge Garments Icons

93. Orange Grunge Stickers

94. Glowing Neon Social Media Icons

95. Glowing Pink Neon Social Networking Icons

96. Green Jelly Social Media

97. Blue Jelly Social Media Icons

98. Blue Chrome Rain Icons

99. 3D Glossy Black Button Social Networking Icons

100. Crystal Clear Bubble Social Media Icons

101. Matte Black Social Media

102.  Ultra Glossy Silver Button Social Media Icons

103. IconsETC Black Inlay on Steel Social Media Icons

104. Free Social Media Icons for Designers – A Life in Pixels

This article will continually update as soon as new material is discovered. If you know or have seen a unique set of icons which are not included here , please leave a link here in the comments