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Desktop apps
Flat
Soft Social Icons
Social, social media, Facebook
DarkSlateBlue
48x48
Social media
SocioCons
Facebook
256x256
Leaf
Face, Facebook, social media
Smooth
Balvardi Social Network Iconset
Social, Facebook, social media
128x128
Buttonz
Facebook, Buttonz
3D
Sweet 16s - free
16x16
UI
Metro UI Icon Set
512x512
Flurry for Social Media
SEO & web
Glyph
Metro Uinvert Dock
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Facebook SVG icons
Facebook, list
PNG MORE
Round Simple Social Icons
58x58
Free Social Icons
square, Facebook
Circle, Facebook, Color
Farm-fresh
32x32
Check Social Icons
Apricum.net social media icons
126x256
Metro UI Dock
Athena HD
126x128