PNG ICO ICNS MORE
UI
Smooth
Corner Stone
off, preferences
DarkGray
32x32
on, preferences
Mixed
Humility
settings, Build, Control
DarkSlateGray
48x48
Computer & hardware
3D
iMod
preferences, Gear, Cog
Black
512x512
VistaICO Toolbar Icons
settings, config, tools
256x256
preferences, config
Shopping & e-commerce
Pretty Office part 3
preferences, Cog, settings
Orange
PNG MORE
Glyph
IconSweets
preferences
50x50
Addictive Flavour
LightGray
Business & finance
Arzo
settings, preferences, Gear
Micro
tools, preferences, settings
Silver
128x128
radar, Nearby, system
system, preferences
Gainsboro
Snowish
preferences, settings, system
Desktop apps
Ciceronian
preferences, settings
59x60
Austerity
Handdrawn
49 hand drawn icons
configuration, settings, preferences
The Spherical icon set
preferences, configuration, repair
MidnightBlue
Programmers pack vol. 1
preferences, Gear, settings
YellowGreen
Mac OS X style
gears, settings, Utilities
Diagram version 2
Gear, preferences
96x96
Music & multimedia
Aquanox
tool, preferences, settings