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UI
Flat
Metro UI Icon Set
windows, Center, mobility
RoyalBlue
512x512
Live, mesh, windows
DodgerBlue
windows, phone
DarkTurquoise
transfer, windows, Easy
ForestGreen
space, card, windows
DarkOrchid
Smooth
All Google icons
Mobile, windows
Black
48x48
Glyph
Metro UI Dock
Mb, windows
256x256
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Windows 8 icons
Client, windows
DarkSlateGray
26x26
windows
Pixel
Windows 8 Pack (Metro Style)
3D
Black and gold
Gnome Web Icons
Gnome, windows, preferences
Gainsboro
32x32
Gnome, preferences, 48
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Gnome, 64, preferences
64x64
Snowish
windows, Applications
WhiteSmoke
128x128
Blue Coral
Ultimate Gnome
Applications, window, windows
Lynx Black
emulator, windows, wine
22x22
Tango
system, preferences, windows
Nuvola
Crystal Clear
Board, windows
DarkSeaGreen
list, windows