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Network & communications
Glyph
Communication & Technology
press, touch, Go
Black
512x512
Message, Comment, Chat
ok, speech bubble, Bubble
invite, Letter, share
envelope, send, invite
UI
Outline
Office icon set
Message, envelope
envelope, Communication, mail
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Mixed
Flat
Flat Green
Chat, Message, Boxchat
Gainsboro
Email, inbox, Message
MidnightBlue
Smooth
Gradient Runded Glowing Icons
Message
MediumAquamarine
128x128
Integral
Letter, mail, Message
DarkSlateGray
Typicons
typing, Message
Windows 8 metro style
Message, read
Message, delete
Social media
Pix Glyph Set - free
Communication, Skype, Chat
Business & finance
FatiCons
Bubble, Message, Text
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3D
Rubber icons
envelope, Message, mail
OliveDrab
192x192
sms, Message, talk
Lavender
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Handdrawn
Jolly Icons Free – 36 Hand-Drawn UI Icons
inbox, letterhead, hand drawn
64x64
Red website beauty
Content, Comment, News
IndianRed
Lexter Flat Outline (apps)
Message, envelope, Email
WinDev Contacts - free
Skype, Chat, Message
LightSeaGreen