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Desktop apps
Flat
Soft Social Icons
google, Google+, plus
Chocolate
48x48
google, writing, blog
Social media
3D
Isometric Social Media Icons
google, plus
UI
Metro UI Icon Set
places, google
512x512
SEO & web
Glyph
Metro Uinvert Dock
google, places
256x256
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Free Social Icons
google plus, google
google, square
Color, Circle, google
Metro UI Dock
google
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google, Mirror, places
640x640
Social Media Stamps
google, Buzz, base
94x94