PNG ICO ICNS MORE
Network & communications
Smooth
Chatting
preferences, config, settings
Black
512x512
Social media
The Circle Icons
config
Desktop apps
Windows 7 toolbar full
group, config
256x256
config, Picasa
paint, config
secure, search, config
config, startup
Stumbleupon, config
user, config, Accounts
UI
Elegant Themes Icons
48x48
Computer & hardware
VistaICO Toolbar Icons
settings, config, tools
preferences, config
Farm-fresh
Edit, Bulk, config
32x32
Mac OS X style
config, Setting, gears
Ultimate Gnome
config, Users