PNG ICO ICNS MORE
Desktop apps
Flat
Appicns
appicns, preferences, system
DarkSlateGray
513x513
Smooth
iOS 7-inspired Mac icon set
preferences, settings
1024x1024
Milkanodised
system, preferences
WhiteSmoke
128x128
Photorealistic
Free Mac Icons
Black
512x512
Farm-fresh
preferences
32x32
preferences, interface
Glyph
16x16 Free Toolbar Icons
settings, tool, config
SteelBlue
16x16
PNG MORE
Ciceronian
59x60
Mac OS X style
gears, settings, Utilities
PNG ICO MORE
Ginux
tools, Administrative, preferences
LightSlateGray
64x64
3D
Free Applications Icons
Configure, cogwheel, rotate
PaleTurquoise
24x24
Go, stop, play
conf, Options, Desktop
iSuite Revoked
Folder, settings, preferences
Pixel
Diagona Icons
preferences, tool
DarkGray
KDE Crystal Diamond
settings, tools, preferences
tools, Utilities, preferences
22x22