[gowld]

Are there current tools? http://outliners.scripting.com is stuff from the 1980s, last updated in 1999

Today's premium Mac offering is OmniOutliner ($20 barebones or $100 full-featured) https://www.omnigroup.com/omnioutliner/

[tjr]

Drummer is his current project:

http://scripting.com/2021/04/03/133021.html?title=theMakingO...

[antiframe]

Emacs has a wonderful outline mode and even more featurful org-mode. Easy to navigate, restructure, filter, etc.

[spccdt]

Here are a few outliners to consider:

* Workflowy * Roam Research * RemNote * Zavala