PNG ICO ICNS MORE
Network & communications
Pixel
16x16 Free Application Icons
Holiday, Aircraft, transport
SteelBlue
16x16
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UI
Windows 8 Pack (Metro Style)
Airport
DarkSlateGray
26x26
Desktop apps
Lion Style Sidebar
Disk, Airport
LightSlateGray
Mixed
IconSweets 2
Airport, transportation, Plane
Black
40x40
Travel & hotels
Google Maps Icons
transportation, Plane, Airport
32x37
Arrows
32px mania
Airport, wireless, harddisk
DarkGray
32x32