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Social media
Smooth
WPZOOM Social Networking Icon Set
Skype
DeepSkyBlue
64x64
Desktop apps
Handdrawn
Web Cartoon
48x48
Pixel
32 Pixel Social Media Icons
32x32
Mixed
Bunch of Bluish Icons
512x512
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Polaroid
62x78
Web 2.0 Origami
250x250
40x40
Skype, med
100x100