Comment by aquariusDue

He also made Treesheets which is where I first heard about him. I recommend people interested in Personal Knowledge Management or related stuff check Treesheets out because while uglier compared to Obsidian there's some really great ideas in there. I won't spoil the fun but if you've got 15 minutes it's pretty easy to go through the tutorial.

https://github.com/aardappel/treesheets