ScintillaTE is an old-ass one. Most people have never heard of it, and those that have have only heard of its variant, UniSciTE, which came bundled as the default text editor for Unity, something like 15 years ago.

Assuming you are talking about OpenOffice and LibreOffice, there's also CollaboraOffice (although this may be counted as another half one, since it's a online fork of LO) and OnlyOffice in the FOSS sphere. Probably more out there I'm not aware off.

I didn’t know Joeffice had a fork. What’s it called?

I think AbiWord is still around, which used to be the FOSS simple, WordPad-like word processor of choice.