Cover icon sources and credits

dupeGuru icon: the dupeGuru project and contributors.
Official source: https://github.com/arsenetar/dupeguru/blob/4.3.1/images/dupeguru.icns
Project license: https://github.com/arsenetar/dupeguru/blob/4.3.1/LICENSE

Czkawka icon: qarmin and Czkawka contributors.
Official source: https://github.com/qarmin/czkawka/blob/12.0.2/data/icons/com.github.qarmin.czkawka.svg
Image license: Creative Commons Attribution 4.0 International (CC BY 4.0).
License: https://creativecommons.org/licenses/by/4.0/
Project attribution: https://github.com/qarmin/czkawka/tree/12.0.2#license

MangoDisk icon: MangoDisk project.
Project: https://github.com/harry0703/MangoDisk

The cover is a generated composition based on these official app icons.
Changes include rendering, placement, background, and decorative document cards.
It is not a screenshot, an official joint product, or an endorsement by the
other projects. Product names and marks identify the software discussed.