Credits

Many thanks to the authors of the 3rd party code used in Ticket Wizard. Here is the list in the alphabetical order.

FreeType Library

FreeType is a freely available software library to render fonts.
Licensed under the BSD-like FreeType license
https://www.freetype.org/index.html

Little CMS

Copyright (c) 2010, 2011 Marti Maria Saguer. All rights reserved.
Little CMS engine is provided free of charge under MIT LICENSE
http://www.littlecms.com/

PDFium

Copyright (c) 2017 PDFium Authors. All rights reserved.
Use of this source code is governed by a BSD-style license.
https://pdfium.goog

Qt

The Qt GUI Toolkit is Copyright (C) 2012 Nokia Corporation
and/or its subsidiary(-ies).
Contact: Nokia Corporation (qt-info@nokia.com) 
Qt is available under the LGPL.
http://qt-project.org/doc/qt-4.8/lgpl.html

XLNT

Released to the public for free under the terms of the MIT License
https://github.com/tfussell/xlnt