PNG ICO ICNS MORE
Network & communications
Pixel
16x16 Free Application Icons
Electric, Storm, thunder
Black
16x16
weather, light, Disaster
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UI
Windows 8 Pack (Metro Style)
snowflakes, Storm, Snow
DarkSlateGray
26x26
Storm
Gnome icons
Storm, weather
32x32
Tango
weather, Storm
DimGray