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Signs & symbols
Glyph
Emergency signs
mark, emergency, sos
Gold
512x512
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Buttons
Map, Gps, pin
Coral
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Business & finance
Free Misc Icon Set 1
ok, Accept, Checklist
Black
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Network & communications
Cloud Computing
Cloud computing, help, question
DarkSlateGray
iOS7 optimized
Miu
Information, Info, Circle
support, Circle, help
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UI
Elysium Icons
mark, approve, Check
DimGray
24x24
Social media
E-commerce
mark, save, bookmark
round, save, linecon
GlyphPack
mark, quote
Math & Business
Answer, mark, Ask
506x512
Mixed
Octicons
Github, mark
Freecns Cumulus
mark
help, question, mark
mark, exclamation, Error
Iconic
question, mark
256x512
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48x48 Free Time Icons
party, Holiday, Balloon
48x48
24x24 Free Application Icons
good, mark
LightGreen
red, mark
question, about, Book
DodgerBlue
mark, help, interrogatory
WhiteSmoke
talk, Bubble, support
Bad, mark
Red