The list at the top could be longer:

- https://asciiflow.com/

- https://asciidraw.github.io/

Anybody know more?

https://github.com/TheoKVA/ascii-box-editor

A visual editor of UTF-8 BOX DRAWING characters, contrary to "ascii" in the name.

No server, no installation: browser-side Javascript only.

D2 https://d2lang.com/ added beta support for ASCII & Unicode output last year.

That would be interesting. I like D2 though the lack of control over the layout is a bit frustrating sometimes.

I have a few more on my site under the bookmarks page. Link in bio.

https://xosh.org/text-to-diagram a list of lots of tools