http://www.dirkwhoffmann.de/virtualc64/
http://www.ajordison.co.uk/index.html
A handy Commodore 8-bit program development utility for Windows
https://www.facebook.com/c64List
https://subchristsoftware.itch.io/charpad-free-edition
CharPad is a graphics data editing tool that facilitates the production of graphics data in a format compatible with the legendary Commodore 64 home computer.
https://nurpax.github.io/petmate/
Petmate is a cross-platform C64 PETSCII image editor, drawing inspiration from the PETSCII editor.
https://programacion-retro-c64.blog/
https://www.commodorespain.es/como-pasar-listados-de-basic-a-txt-texto-y-viceversa-en-commodore-64/