I want a FOSS knowledge management application that supports quick-linking, backlink browsing, a graph visualisation, and tagging. I'm yet to find something that doesn't leave one of these features out, or has some other deal breaker (not FOSS, can't backup, no markdown support, not cross platform, etc).

This looks like it might fill that void, but I don't like that it's based on tying together VSCode extensions. I want something standalone, dependable, and usable purely off-line if need be.