I don't want to say this is a rip-off, but it does share a remarkable resemblance to Ted Nelson's pre-Berners-Lee hypertext Project Xanadu (http://en.wikipedia.org/wiki/Project_Xanadu). Here's a recent screenshot http://www.open-hypervideo.org/img/xanadu.jpg.

That man has been trying to get traction on it since 1960. He's quite remarkable.

Actually, reading their blurb is like reading his work from then. If you know the story of Nelson and Xanadu, the lack of credit to him is a little unforgivable.

A bit like the visions of Nelson & Engelbart, http://thoughtvectors.net/

Inkling is working on related challenges with ebook authoring, https://www.inkling.com/blog/2014/06/problem-of-structured-a... .

InfinitePDF on iOS allows non-linear navigation paths to be overlaid on an existing PDF, http://www.148apps.com/reviews/infinite-pdf-review/

The challenge for all of these solutions is migration/import/rewrite of existing content.

Thanks for pointing out Gingko - it looks like it could have the right mix of features that I miss in Workflowy, i.e. going beyond lists/outlines and having richer content in leaf nodes. Excited to try it out!

On daily work for outlines, I use Workflowy, which is easy to edit; and on systematize knowledge or stuff, I use Weavi, which is a decent product.

Thanks for the pointer. Tried it out - it's similar to Gingko but seems much less polished, and I couldn't find the keyboard shortcuts! I guess the advantage is that it's free. I really hope this kind of text manipulation will get developed further.

Agreed that this form of data capture seems powerful.