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Ravenna
exclamation, warning, wrong
Goldenrod
256x256
Silk
wrong, Error, warning
16x16
warning, exclamation, Alert
wrong, Alert, Error
exclamation, warning, notice
exclamation, wrong, Alert
Fugue
Drill, exclamation, warning
Flashlight, exclamation, Alert
Error, button, warning
exclamation, Hard, hat
Error, exclamation, wrong
postage, Alert, Error
warning, Highlighter, wrong
wrong, warning, exclamation
exclamation, wrong, warning
protect, shield, security
Web Design
Alert, Error, button
32x32
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Signs & symbols
Glyph
Buttons
warning, Alert, danger
512x512
Mixed
Flat
Things
gold, bell, church
Smooth
Simplicio
warning, Alert, Attention
128x128
Computer & hardware
Pixel
Bitcons
Alert
64x64
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Desktop apps
3D
Free Applications Icons
danger, Message, Attention
24x24