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Mixed
Outline
Watchify v1.0 - 32px
Alert, warning, chime
Black
512x512
UI
Glyph
Google Material Design icons
warning
Very Basic. Android L (Lollipop)
problem, Attention, warning
Hawcons
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Material Core
sign, warning
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Computer & hardware
Mirrored Twins (hollow)
sign, Caution, warning
Desktop apps
Minicons
Alert, White, warning
warning, Alert, Dialog
Geomicons
Network & communications
Communication & Technology
wave, Attention, Error
Files & folders
Flat
small-n-flat
warning, shield
Typicons
Freecns Cumulus
errror, warning, Cloud
warning, Error, Attention
Cloud, warning
mark, exclamation, Error
Information, warning
warning, Cloud
Halloween
Photorealistic
Desktop Halloween
user, kill, Caution
256x256