[jabyess]

There's also a FOSS version called foam https://foambubble.github.io/foam/

[AlanYx]

Another two good Foam-like VSCode tools are Markdown Memo (https://github.com/svsool/vscode-memo) and Dendron.

I personally prefer vscode-memo to Foam. It doesn't have a graphical view, but there a couple other things it does really well, especially its (optional) support for flattened wikilinks to hierarchically organized notes.

[neurotrace]

Seconded. I've been using Foam for some time now and it's been great. Since it's all VS Code, it's also very hackable