The wxWidgets Library is freely available in source code form for new users to copy and use it to build their own software applications. Duxbury Systems has done so, and its customers have the same access to wxWidgets libraries to build their own software if they so choose.
All developers who build applications based on wxWidgets code retain the copyright on their own work, whether that work includes only code within their own application or additions to the wxWidgets library itself. Duxbury Systems retains its copyright on both our applications built over wxWidgets and our additions to wxWidgets written for those applications.
The text of the wxWidgets/wxWindows license is presented verbatim, below.
Copyright (c) 1998-2005 Julian Smart, Robert Roebling et al
Everyone is permitted to copy and distribute verbatim copies of this licence document, but changing it is not allowed.
WXWINDOWS LIBRARY LICENCE
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public Licence as published by the Free Software Foundation; either version 2 of the Licence, or (at your option) any later version.
This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public Licence for more details.
You should have received a copy of the GNU Library General Public Licence along with this software, usually in a file named COPYING.LIB. If not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
EXCEPTION NOTICE
1. As a special exception, the copyright holders of this library give permission for additional uses of the text contained in this release of the library as licenced under the wxWindows Library Licence, applying either version 3.1 of the Licence, or (at your option) any later version of the Licence as published by the copyright holders of version 3.1 of the Licence document.
2. The exception is that you may use, copy, link, modify and distribute under your own terms, binary object code versions of works based on the Library.
Under the above exception, Duxbury Systems distributes a binary object code version of the wxWidgets library, linked into its software programs, under the terms of the Duxbury Systems EULA. Any user with an interest in doing so is encouraged to download the wxWidgets source code to make her/his own additions to this free library.
Download links for versions of wxWidgets on various platforms can be found at https://www.wxwidgets.org/downloads/.
In addition, the latest wxWidgets version is available on GitHub (see https://github.com/wxWidgets/wxWidgets).