Ask HN: Looking for a certain HN submission from a few months ago

I'm not sure if this is the appropriate place to ask, but I can't think of a better place to ask.

There was an HN-submitted article a few months ago listing various (recalling it again I'm pretty sure the number was in the low-end, like 4 or something) digital tools that supposedly can potentially change how we work or think. I think one of them was some kind networked note-taking tool. The article seems well-thought-out and not just another generic "15 cool tools for doing X" kind of article. But I forgot to save the link, and I can't come up with right keywords to find it again.

Does anyone know what article I'm talking about?