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Desktop apps
Outline
Minicons
Alert, White, warning
Black
512x512
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Glyph
16x16 Free Toolbar Icons
nell, Alert, time
LightCyan
16x16
problem, warn, danger
Gold
Smooth
Farm-fresh
exclamation
Tomato
32x32
PNG MORE
3D
Free Applications Icons
Message, Attention, exclamation
OrangeRed
24x24
Alert, exclamation, General
Alert, hanger, warning
danger, Message, Attention
Goldenrod
One bit
exclamation, Alert, notice
DarkGoldenrod
48x48
Pixel
Diagona Icons
Attention, Alert, exclamation
Splashyfish
Error, Attention, exclamation
Red
Circular
Alert, exclamation, warning