Duxbury Systems Use of Third-Party Open Source Software

Open Source software often provides useful tools and functions that advance the state of the art for all software developers as well as software users. Several Duxbury products include Open Source software from a third party.

Generally speaking, Open Source software is available on the Internet in source code form, where any developer or user can obtain it and compile it into new works subject to the restrictions of the original authors and contributors.

The compiled, binary form of such software is often referred to as a library, package, or component. In many cases, the compiled forms of Open Source software are likewise available for copying and re-use, and once again this use is subject to the restrictions imposed by the original authors and contributors. To redistribute any such component, one must include the copyright statement and terms of use that accompany that component.

Most Duxbury Windows and MacOS products use the wxWidgets Cross-Platform GUI Libraries to implement the user interface and provide a number of low-level functions. (See https://www.wxwidgets.org for more information on wxWidgets.)

All other third-party open source software used in Duxbury products is listed explicitly in this topic and the related subtopics. Note that components shipped with a Duxbury product and not listed below should be understood to be subject to the copying restrictions outlined in the Duxbury End-User License Agreement (EULA).

The lists below do not include information about Open Source software that may be included in the operating system software on which the Duxbury application runs. The manufacturer of the operating system should post information about its use of Open Source software.

Open Source Components by Duxbury Product

Additional Open Source software components included with each Duxbury product appear in the sections below.


DBT includes several additional Open Source components on the Windows platform only. These are used to support importing various document file formats.


NimPro includes two data files that are used to interpret the symbols that may appear in DAISY/NIMAS input documents that include MathML.

Certain wxWidgets libraries used by NimPro are in whole or in part contributed by third parties to WX and have their own copyrights. Duxbury acknowledges the copyrights of these parties in these libraries (components).

Perky Duck

No additional Open Source material is used in Perky Duck.


QuickTac for MacOS includes additional copyrighted Open Source software to implement curve drawing.