MetaClean includes the following free software. Each remains under its own license.

ExifTool by Phil Harvey (Windows package by Oliver Betz)
  https://exiftool.org   https://oliverbetz.de/pages/Artikel/ExifTool-for-Windows
  Free software; you can redistribute it and/or modify it under the same terms
  as Perl itself (the Artistic License or the GNU General Public License).
  Includes a Perl runtime under the same terms.

Python 3.13 (Python Software Foundation License)   https://www.python.org
Tcl/Tk (BSD-style license)                          https://www.tcl.tk
pikepdf (Mozilla Public License 2.0)                https://github.com/pikepdf/pikepdf
  Source code for pikepdf is available at the link above.
QPDF (Apache License 2.0)                           https://qpdf.sourceforge.io
Pillow (MIT-CMU / HPND license)                     https://python-pillow.org
lxml (BSD license)                                  https://lxml.de
PyInstaller bootloader (GPL 2.0 with a special exception that allows
  distribution of bundled programs)                 https://pyinstaller.org

FFmpeg and FFprobe 9.0, LGPL shared build by BtbN  https://ffmpeg.org
  Licensed under the GNU Lesser General Public License 2.1 or later
  (see tools\ffmpeg\FFMPEG-LICENSE.txt). Unmodified binaries from
  https://github.com/BtbN/FFmpeg-Builds ; source code at https://ffmpeg.org/download.html
  and https://github.com/FFmpeg/FFmpeg . The FFmpeg libraries are separate DLL
  files in tools\ffmpeg and can be replaced with any compatible build.
