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UI
Flat
Metro UI Icon Set
google, Doc, docs
SteelBlue
512x512
SEO & web
Glyph
Metro Uinvert Dock
google, docs, word
256x256
docs, Doc, google
Social media
Metro UI Dock
Doc, google, docs
word, google, docs
Desktop apps
Smooth
Flurry for the web
chrome, google
word, docs, google
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Music & multimedia
Social + Tabs Color: Free
google
40x40
Google +1 icons
Blue, One, plus
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
3D
Original Buzz
google, Painting, Buzz
Social Media Mini
google, talk
48x48