PNG ICO ICNS MORE
Network & communications
Pixel
16x16 Free Application Icons
no, Exit, delete
Red
16x16
Minus, sign, forbid
Mixed
Smooth
On-stage
remove
128x128
PNG MORE
Desktop apps
3D
Free Applications Icons
no entry, restricted, forbidden
24x24
Minus, forbid, restrict
no entry, unable, Exit
Business & finance
Free Icons Web
delete, remove, Exit
125x128
Splashyfish
remove, Calendar, day
remove, Month, Calendar
week, remove, Calendar
remove, delete
remove, Minus, sign
Minus, sign, remove