Roam Research is a newly developing tool created by Conor White-Sullivan that focuses on creating a graph of notes instead of the traditional hierarchical system of most note-taking systems.
With the Zettelkasten-inspired system, you can use it to create a wiki similar to Wikipedia (e.g., [[id:29ecbd86-ad97-4882-aa3f-56b5b90025d5][Digital gardens]]).
However, it is closed source and (thankfully) open source alternatives like [[https://github.com/jethrokuan/org-roam][Org-roam]], [[https://github.com/logseq/logseq][Logseq]], and [[https://github.com/dendronhq/dendron][Dendron]] started to fill our Roam-voided hearts.