PNG ICO ICNS MORE
Super Mario
Block, exclamation, retro
Gold
256x256
Matte: Basic
exclamation, Alert, Error
32x32
Oxygen-Refit
exclamation, Dialog, Alert
128x128
Circular
Error, exclamation, warning
16x16
Folder, exclamation, Alert
Web Application
warning, wrong, Alert
48x48
Function
warning, wrong, exclamation mark
Refresh CL
wrong, Error, exclamation
PNG ICO SVG MORE
Signs & symbols
Glyph
Emergency signs
mark, emergency, sos
512x512
Smooth
Super Mono Basic
yellow, exclamation, frame
Desktop apps
16x16 Free Toolbar Icons
problem, warn, danger
Gaming & gambling
Cartoon
Block, retro, exclamation
Pixel
Alert, exclamation, warning
UI
Function icons
triangle, sign, Caution