On Tue, Jan 11, 2022 at 6:13 AM Ralph Corderoy <ralph@inputplus.co.uk>
wrote:

There's also Neatroff by Ali Gholami Rudi.  It has TeX's paragraph
> formatting and several other new features, taking from Plan 9,
> Heirloom, and Groff.
>

I remember reading somewhere that some versions of `more' and/or `less'
used TeX paragraphing when breaking long lines for display, but I can't
track it down now.