https://notabase.io - a note-taking app for networked thinking.

It supports page stacking, linked references, block references, a graph view, and all that good stuff. Think of it as similar to Roam Research / Obsidian.

It's also open source so you can self-host it. Here's the code: https://github.com/churichard/notabase

I'm hoping to add support for shareable links soon. Open to other ideas or feedback!