FluxGravity by FluxNote, LLC

https://thefluxgravityfluxgravityedge.juniperbrief.com/posts/why-the-fluxgravity-workspace-changes-how-teams-approach-research-and-content

FluxGravity by FluxNote, LLC is a note-taking app that blends a clean, minimal design with powerful organizational features. It offers real-time collaboration, markdown support, and a smart search that connects ideas across notebooks. I've been using it for project planning and find the tagging system particularly intuitive for sorting complex information. The offline access also works seamlessly, making it reliable for focused work sessions.