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Network & communications
Glyph
Communication & Technology
envelope, send, invite
Black
512x512
UI
Outline
Office icon set
envelope, Communication, mail
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Mixed
gcons
Communication
Social media
Pix Glyph Set - free
Communication, Linkedin, Community
Metro Contact - free
face book, media, Social
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Education & science
Handdrawn
Brainy Icons Free — 36 Science and Education Icons
Computer, Notebook, network
64x64
Talking, Comments, hand-drawn
science, Atom, nuclear
submit, creative, Letter
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Halloween
Photorealistic
Desktop Halloween
Connection, insects, spider's web
256x256
Avatars & smileys
Jolly Icons — Part 1: Social Media and Communication
Social, hand-drawn, Behance
@, mail, send
Bubble, Messenger, Message
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Mobile apps
Free Retina Icon Set
Android, Mobile, Social
60x60
Apple, Fruit, Communication
Social, Connections, media
3D
Free Large Twitter Icons
Logo, twitter, Social
Gaming & gambling
48x48 Free Object Icons
Mobile, Finance, touchscreen
48x48
Business & finance
48x48 Free Time Icons
talk, Communication, stationary
Pixel
24x24 Free Pixel Icons
web, global, Orb
24x24
16x16 Free Application Icons
internet, Social, twitter
16x16
Black 48x48 Icons - free
social media, twitter, Social
Win8 and iOS Tab Bar Icons - free
twitter, bird, share
Communication, Facebook, Like
