PNG ICO ICNS MORE
Network & communications
Pixel
16x16 Free Application Icons
Minus, sign, forbid
Red
16x16
PNG MORE
Flags
Stripe Flag Set
no
Tomato
23x23
Business & finance
Glyph
Gentle Edges Icon Set
Not, Access, permitted
Black
128x128
UI
Windows 8 metro style
Connection, no
DarkSlateGray
512x512
Flat
Metro UI Icon Set
user, frame, no
SEO & web
Metro Uinvert Dock
256x256
Signs & symbols
3D
Free 3d Glossy Interface Icon Set
glossy, forbid, sign
Gainsboro
64x64
delete, Exit, Entry
erase, err, reject
cancel, wrong, Error
OrangeRed
stop, remove, Error
delete, no exit, Close
Desktop apps
Smooth
Farm-fresh
smoking, no
32x32
Social media
Metro UI Dock
frame, user, no
Healthcare & medical
Medical icon set
Shadow, no, Blood
Crimson
Beat, Heart, no
shadwo, plant, no
no, stethoscope, Sh
no, Shadow, tubes
TSGK Flags
frame, Mirror, no
640x640
no, frame, user
Windows 8 icons
no, Connection
26x26
Family & home
IconBeast Lite
Entry, no
30x30