PNG MORE
Business & finance
Glyph
24x24 Free Application Icons
warning
Goldenrod
24x24
stop, Abort, Block
Black
Attack, Error, Alert
DarkSlateGray
Error, sign, Blocked
Red
PNG ICO ICNS MORE
UI
Windows 8 metro style
shield, warning
512x512
Windows 8 icons
26x26
Mixed
Retina Display Icons
Silver
64x64
Desktop apps
16x16 Free Toolbar Icons
nell, Alert, time
LightCyan
16x16
problem, warn, danger
Gold