PNG ICO ICNS MORE
Computer & hardware
Pixel
WooCons #1
Attention, sign, warning
Gold
32x32
PNG MORE
Music & multimedia
Smooth
DeviantArt Gallery Icons
warning
DarkSeaGreen
110x110
Desktop apps
Handdrawn
Web Cartoon
Alert, warning
Orange
48x48
UI
Elegant Themes Icons
warning, Database
WhiteSmoke
warning, paper
LightGray
group, warning, person
DodgerBlue
warning, person
DarkSlateGray
person, warning
White, person, warning
Gray
DarkGoldenrod
Business & finance
3D
Refresh CL
security, warning
Black
256x256
warning, Error
Gnome Web Icons
Dialog, Gnome, warning
Chocolate
warning, Dialog, Gnome
PNG ICO MORE
Attention, warning, Dialog
DarkOrange
64x64
Mixed
PixeloPhilia
Alert, Attention, exclamation
Crystal Office Collection
warning, 24
24x24
24, warning
Bunch of Bluish Icons
exclamation, Alert, warning
DeepSkyBlue
512x512
Juicy Fruit
Simplicio
Application, warning
SteelBlue
128x128
warning, document
Goldenrod
warning, File
warning, Folder