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Desktop apps
Smooth
Icons Mega Pack 1 and 2
Utorrent, square
ForestGreen
256x256
Flat
Circle Icons
starbucks
512x512
3D
Mozilla icons
sunbird
New Google Product Icons
spreadsheets
128x128
Metro UI Dock
search
Pixel
Webset Icons
Stumbleupon
48x48
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Splashyfish
icon | Icon search engine
20x20
slider
16x16
KDE Crystal Diamond
22x22