Introduction / TL;DR
Existing note-taking apps like OneNote or Evernote are unsatisfying to me, especially when it comes to ordering and structuring your notes and keeping control over your data. This is why I have built an app called NENO (an acronym for “network of notes”) that not only lets you take notes, but also helps you to create your personal knowledge graph by letting you link individual notes and define the topology of the resulting graph, i. e. you can freely position the nodes on a 2D plane. With this, you are able to create a visual map of your knowledge, which I find immensely helpful and insightful. At the same time, you retain complete control over your data because you can decide if it is saved on your computer, in a cloud storage of your choice, or even on a server under your control. You can try it out now here (works with Chromium-based browsers). The source code is available on GitHub.