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Desktop apps
Glyph
Ourea Icons
Calendar
Black
256x256
Flat
Appicns
Calendar, Empty, ical
513x513
ical, Calendar
Handdrawn
Marker-Style Icons
64x64
3D
Sigma
Smooth
Mac OS X style
Calendar, ical
512x512
Cartoon
Smashy The Alien Icon Set
128x128
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KDE Crystal Diamond
date, event, Calendar
22x22