Oxygen icons, by Oxygen project: https://techbase.kde.org/Projects/Oxygen
License: LGPL v.3, see COPYING

Extensions:
1) application-enex (32x32 + 22x22 + 16x16 png images + svg icon) - custom icon based on Oxygen's application-x-zerosize
License: GPL v.3
Copyright: Dmitry Ivanov
