PNG ICO ICNS MORE
UI
Pixel
Fugue Icons
Edit, double, underline
Black
16x16
Edit, underline
Gnome icons
Text, underline, Format
Gainsboro
24x24
Desktop apps
Splashyfish
underline, Text, rich
DarkGray
Tango
Format, Text, underline
32x32
Computer & hardware
ASP.NET icons
underline
DarkSlateGray
Silk
Text, underline