qDex names: book.png, find.png, help.png, next.png, prev.png, print.png, update.png
Licence: LGPL
Icon set: KDE
Source: Qt 4.4.3 Open Source Edition Copyright (C) 2008-2009 Nokia Corporation
Download location: http://get.qt.nokia.com/qt/source/

qDex name: exit.png
Licence: LGPL
Designer: Everaldo Coelho (http://www.everaldo.com)
Icon set: Crystal Clear
Search names: exit icon, shut down icon
Download name: 1245521645_exit.png
http://www.iconfinder.net/icondetails/3226/22

qDex name: qdex.ico
Licence: Free use (See license at http://www.rw-designer.com/view/sets/lic_free_en.txt)
Used with written permission from Jan Miler, as Licence required.
Designer: Jan Miler (jan.miler@gmail.com)
Icon set: Application Help (http://www.rw-designer.com/icon-library?search=book)
Download name: open_book.ico
http://www.rw-designer.com/icon-download.php?id=62