On 14.4.2019 13.42, H wrote: > I would love to find an old-fashionedoutliner, like the ones that > used to exist prior to the modern GUIs. It would make writing > structured documents, or organizing thoughts in general, so much more > convenient, productive and faster. Ideally it should allow saving > files in txt, OO and markdown formats... Org-mode fits the bill. Emacs org-mode seems to get positive reviews, and it has been ported to vim too (many alternative plugins, but probably with less features than the original emacs version). https://en.wikipedia.org/wiki/Org-mode Org 9.2 was released in December 2018, so the development seems not to be dead. I have no personal experience with any programs of this type. I sometimes use the outline mode in MS Word, just because I'm lazy. - Jussi