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Network & communications
Glyph
Communication & Technology
ok, speech bubble, Bubble
Black
512x512
invite, Letter, share
envelope, send, invite
UI
Outline
Office icon set
Message, envelope
envelope, Communication, mail
Typicons
typing, Message
Message
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Social media
Handdrawn
Jolly Icons Free – 36 Hand-Drawn UI Icons
inbox, letterhead, hand drawn
64x64
Mixed
Lexter Flat Outline (apps)
Message, envelope, Email
Education & science
Brainy Icons Free — 36 Science and Education Icons
Talking, Comments, hand-drawn
sheepskin, education, Message
submit, creative, Letter
Avatars & smileys
Jolly Icons — Part 1: Social Media and Communication
Bubble, Messenger, Message
Mobile, Cell, Message
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Photography & graphic design
3D
32x32 Free Design Icons
Email, Message, @
32x32
Gaming & gambling
Photorealistic
48x48 Free Object Icons
Chat, messages, Messenger
48x48
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Business & finance
Pixel
24x24 Free Pixel Icons
forum, Social, talk
24x24
Win8 and iOS Tab Bar Icons - free
twitter, bird, share
60x60
Communication, Facebook, Like
iOS 7 icons
Free Mobile Icon Kit
Attention, Message
Signs & symbols
Free 3d Glossy Interface Icon Set
Attention, Error, cautious
warning, danger, Alert
Prompt, danger, exclamation
