PNG ICO ICNS MORE
Mixed
Glyph
Simple Icons
settings, tools
Black
512x512
Network & communications
Iconico
configuration, Options, config
1024x1024
tools, settings, preferences
Options, system, settings
PNG ICO ICNS SVG MORE
Icons Solid
settings
Material Core
settings, Applications
PNG SVG MORE
Files & folders
AwesomeFolders
configuration, cogwheel, preferences
UI
Google Material Design icons
Octicons
448x512
WPZOOM Developer Icon Set
Business & finance
48x48 Free Time Icons
Cartridge, lightning, fastening
48x48
watch, Clock, history
Gentle Edges Icon Set
settings, preferences, Wrench
128x128
Windows Metro
Free Mobile Icon Kit
settings, phone
64x64
Flat UI Icons Free
tools, preferences, settings
Picol Vector
backup, settings
Text, settings, document
settings, Server
size, settings, Both
size, height, settings