[stinkytaco]

Fairly similar to roam. It has:

Atomic nodes.

Citations.

A map of linked nodes.

Tiddlywiki and org-mode can also offer similar experiences I'd you take the time to set them up.

[FullyFunctional]

"roam" isn't easy to search for. Do you have a link.

Does org-mode have the graphical map like NoteCards?

[entrepy123]

That Roam link would be https://roamresearch.com.