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Avatars & smileys
Handdrawn
Jolly Icons — Part 1: Social Media and Communication
Social, Foursquare, hand-drawn
Black
512x512
Social media
Glyph
Minicons Social
Foursquare
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Photography & graphic design
3D
32x32 Free Design Icons
square, Foursquare, quadrate
32x32
Desktop apps
Simple Icons
4096x4096
Vector 3D Social Icons
256x256