PNG ICO ICNS SVG MORE
Social media
Glyph
Social Media & Logos I Glyph
wide, Bubble, web
DarkSlateGray
512x512
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Flat icons
speech, Bubble, safety
256x256
Bubble, Server, speech
phone, speech, Bubble
Pen, speech, Bubble
Bubble, weight, speech
Free icons for Windows8/Metro
Bubble, speech
PNG MORE
Gentleface
Message, Bubble, Chat
48x48
Icons8 — ever-growing set of Windows 8 (Metro style) icons
26x26
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IC Minimal
Bubble, speach
64x64
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Network & communications
Cloud Computing
speech, retro, Cloud
speech, speech bubble, communicate
Mixed
Flat
iconsimple (freebies)
Chat, Bubbles, talk
UI
Windows 8 metro style
speech, Bubble
Business & finance
FatiCons
Bubble, Message, Text
Computer & hardware
Ballicons (free)
Bubble, talk, Social
128x128
Windows 8 icons
Pixel
Windows 8 Pack (Metro Style)