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UI
Glyph
Windows 8 metro style
Grid
DarkSlateGray
512x512
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Freecns Cumulus
Black
Business & finance
FatiCons
Computer & hardware
Ionicons
Pictype Free Vector Icons
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Windows 8 icons
26x26
Mixed
IcoMoon
32x32
Desktop apps
16x16 Free Toolbar Icons
window, windows, layout
DarkCyan
16x16
Wireframe mono icons
48x48
3x3, Grid