PNG ICO ICNS MORE
Desktop apps
Pixel
Splashyfish
First, Controls, media
DimGray
16x16
light, Controls, First
DarkGray
UI
Tango
Go, First
Black
32x32
Computer & hardware
Smooth
Crystal Project
Letter, upper, First
DarkSlateGray
tab, First
Network & communications
Oxygen
Go, First, rtl
48x48
ASP.NET icons
First
DarkGreen
3D
Crystal Clear
First, upper, Letter
Silk
First, resultset
CornflowerBlue