I sometimes use style and diction tools from GNU project. (I have some
enhancements I need to share back.)
The video also mentioned "proofer" from WWB. Where can I find the
Writer's Workbench (WWB) tools like proofr, punct, double, splitinf,
prose, findbe, abst, org, and maybe others? (It would be nice if there
were some maintained versions that I can use on NetBSD now, but if not
I could port them as needed.)