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Desktop apps
Smooth
Flurry for the web
chrome, google
SteelBlue
512x512
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Music & multimedia
Social + Tabs Color: Free
google
40x40
Social media
YOOicons Social Bookmarks
Box, Social, google
google, Blue, Social
Box, Buzz, Social
Socialize 3
talk, google
128x128
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Elegant Media Icons
64x64
Social Media Mini
google, talk
48x48