- This tool is forked from https://github.com/rjrudman/penpa-edit for further enhancements and to add new features.
- https://github.com/rjrudman/penpa-edit is forked from https://github.com/opt-pan/penpa-edit (original creator)
- Some of the translations on https://github.com/rjrudman/penpa-edit were provided by kamikazegargoyle (https://www.youtube.com/channel/UCNmuf8BQzXqgVl4PJFHCL0A)
- Thanks to Ropeko for restructuring all the colors in the code.
- Thanks to Alice for restructuring all the files in the code.
- NewYear Image by Christine Aubé from Pixabay
- NewYear Image by Patty Jansen from Pixabay
- Help icon made by Roundicons from www.flaticon.com
- Thanks to William42 for SVG Screenshot code.
- Thanks to nmay231 for contributions to puzz.link parser in Penpa+.
- Thanks to davmillar for contributions to redesign the GUI and refactoring the code.
- Thanks to Kieran Clancy for contributions to smart checking in Penpa+.
- Thanks to BenceJoful for contributions to hexgrid and replay improvements in Penpa+.
- Thanks to Mark Langezaal for contributions to improve Penpa+.