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UI
Glyph
GlyphPack
Circle, question
Black
512x512
Outline
ikooni outline: Free Basic
Info, message bubble, about
Free basic
question, customer services, Information
Tomato
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Windows 8 metro style
question
DarkSlateGray
26x26
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question, shield
Freecns Cumulus
help, question, mark
Smooth
Snipicons
sign, question
DodgerBlue
All Google icons
B, question
128x128
ForestGreen
question, Lb
question, O
Firebrick
P, question
SlateBlue
question, y
Gold
question, r
Windows 8 icons
shield, question
Pixel
Windows 8 Pack (Metro Style)
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Super Mono Stickers
question, Balloon, sticker
64x64
sticker, frame, question
sticker, question
sticker, button, question
3D
Gloss Basic Icons
Faq, question, Information
32x32
AzulLustre 2
support, question, help
256x256
Gnome Web Icons
Dialog, Gnome, question
SteelBlue