PNG ICO ICNS SVG MORE
Mixed
Smooth
Tango Icon Library
warning, Dialog
Black
512x512
UI
Snipicons
warning, sign
PNG ICO ICNS MORE
Desktop apps
Farm-fresh
warning, compile
32x32
Computer & hardware
Crystal Project
stock, Dialog, warning
Business & finance
Luisance Pack
warning
256x256
Juicy Fruit
Simplicio
warning, File
128x128
shoppingcart, warning
Shopping & e-commerce
Pretty Office part 3
user, warning, male
Primo
Developer Kit
messagebox, warning
Futurosoft
Adept, warning, notifier
KDE Crystal Diamond
22x22