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Desktop apps
Flat
Smallicons: logotypes
Browser, Opera
IndianRed
480x512
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Social media
iconsimple: logotypes
Opera, internet, Logo
512x512
Social Media Piconic
Opera
Black
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Mobile apps
iOS 7 Style - Metro UI Icons
Opera, Metroui
Crimson
Metroui, Opera
Red
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Simply 8-bits #8
96x96
Squareplex
Circular icon set
256x256
Files & folders
Minimalism
Metro UI Dock
UI
Metro UI Icon Set
Opera, Mirror
640x640
Mirror, Opera