Perplex is an open source theme for the open source software Hugo. There are no other mandatory software requirements, but theme and documentation ship with external software and content. Their licensers and the licenses of their choosing are listed here, also.

Perplex and its documentation

The theme
is released by Jörg (Georg) Makowski under the Apache 2.0 License.
The documentation
is released by Jörg (Georg) Makowski under the Creative Commons License (CC BY-SA) except the material from other sources.

Website generator Hugo

Hugo
is released by its authors and contributors under the Apache 2.0 License.

Fonts and icon fonts

IBM Plex fonts
have been released by IBM to the public under the Open Font License (OFL).
Material Icons
have been released by Google to the public under the Apache 2.0 License.

Javascript libraries

Lazysizes
has been released to the public by Alexander Farkas under the MIT License.

Optional software

KaTeX
has been released by Emily Eisenberg, Sophie Alpert and contributors under the [MIT License][https://github.com/KaTeX/KaTeX/blob/main/LICENSE].
Mermaid
has been released by Knut Sveidqvist and contributors under the MIT License.

Logos and pictures

All logos
remain under the copyright of their respective owners. Perplex logos are released under the Apache 2.0 License by Jörg (Georg) Makowski.
All pictures
Remain under the copyright of their respective owners. The image caption usually mentions the author and a link to the source except for images in the public domain.

[mit]: