PNG ICO ICNS MORE
Signs & symbols
3D
Free 3d Glossy Interface Icon Set
stop, remove, Error
Black
64x64
Computer & hardware
Smooth
Crystal Project
Navigator, table, stock
LightSlateGray
16x16
Must Have
Close, no, reject
Firebrick
256x256
Pixel
Sweetie BasePack
wrong, square, red mark
IndianRed
PNG MORE
Desktop apps
Free Applications Icons
remove, delete, reject
Crimson
24x24
reject, no, wrong
delete, no, Cancelled
UI
Gnome icons
table, Navigator, wrong
DarkGray
Photography & graphic design
Dark Glass
Error, Close, wrong
DarkRed
128x128
Network & communications
Oxygen
wrong, no, stop
48x48