PNG ICO ICNS MORE
Music & multimedia
Smooth
Impressions General Icons
Lock
Black
256x256
Business & finance
Stroke
Sigma
release, Lock
400x400
Diagram
96x96
PNG ICO MORE
Lock, Safe
64x64
open, secure, Lock
Desktop apps
Farm-fresh
Lock, Add
32x32
delete, Lock
Lock, Break
Edit, Lock
Lock, Go
Mac OS X style
Lock, secure, private
512x512
Computer & hardware
Futurosoft
Network & communications
Oxygen
48x48
Shopping & e-commerce
Siena
green, Lock
Lock, red
yellow, Lock
KDE Crystal Diamond
22x22