PNG SVG PSD EPS MORE
Signs
Flat
Computer Security
warning, notice, Signaling
SandyBrown
512x512
Essential Collection
signs, exclamation, danger
PNG ICO ICNS MORE
SweetiePlus
warning
16x16
PNG ICO MORE
Webtoys
sign, warning
64x64
Gloss: Basic
warning, wrong, exclamation
32x32
Gnome 2.18 Icon Theme
wrong, exclamation, warning
Free Web Design
Alert, warning, feed
Rss, warning, Error
LED
octagon, warning, Error
Farm-Fresh Web
Alert, warning, exclamation
exclamation, Error, wrong
Silk
subscribe, Rss, exclamation
Silk Companion 1
feed, subscribe, warning
Mixed
Smooth
Angular UI
watch out, warning
3D
warning, sign
Desktop apps
Farm-fresh
pending, warning, Error
UI
Pixel
Gnome icons
warning, gtk, Dialog