Likewise the graph view for obsidian (not foss) or foam (extension for vscode/vscodium) . The graph view is perhaps less useful than the traditional mind map (great if you just want to see connections though) but overall these options are much more powerful
To be fair, the only one I used in the past was FreeMind for personal notes. I can't say if it is truly better, just providing you some FOSS software. I also found this one, which I never heard before: https://en.wikipedia.org/wiki/Vym_(software)