-Anki icon by Alex Fraser (CC GNU GPL)
-Deck icon: Be Box Icons (non-commercial use)
-Deck due/new icons from:
 http://led24.de/iconset
 http://p.yusukekamiyamane.com/
-Other icons obtained from KDE themes (GPL/LGPL)

Note that some of the icons have been modified to fit in with Anki better
(grayscaled, cropped, etc).