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Desktop apps
Smooth
Ciceronian
preferences, settings
DarkSlateGray
59x60
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Music & multimedia
Simple
configuration, settings
WhiteSmoke
128x128
hammer, tools, settings
Black
Files & folders
iD
planet, Browser, internet
LightSkyBlue
Mac OS X style
gears, settings, Utilities
512x512
Aquanox
tool, preferences, settings
UI
Elegant Blue Web
settings, Options
SteelBlue
64x64
settings
Ultimate Gnome
Gear, radar, settings
256x256
Photography & graphic design
Transformers
tools, configuration, settings
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Ginux
tools, Administrative, preferences
LightSlateGray
Cog, Gear, settings
settings, Controlpanel
Soft Icons
preferences, Utilities, execute
Gray
Mixed
Basic Set
preferences, Gear, tools
Silver
iSuite Revoked
Folder, settings, preferences
3D Cartoons III
settings, widgets
Sleek XP: Software
widget, engine, Bra
Hydro Pro
Control, settings, gears
User Interface Icons
settings, config, Edit
LightBlue
80x80
Computer & hardware
Crystal Project
settings, tools, preferences
settings, Kcmsystem
LightGray
settings, software
settings, monitor, screen
Gainsboro