A few alternatives in this space: org-roam https://www.orgroam.com/ tiddlyroam https://tiddlyroam.org/ Dendron https://dendron.so/ Foam https://foambubble.github.io/foam/ Remnote https://www.remnote.io/ Obsidian https://obsidian.md/ logseq https://logseq.com/ Not an expert with them at all. I've never had a desire to dig into all their complexity, but some are pretty passionate about it.
RemNote looks good. From the FAQ Data Ownership: You own your data - always. You'll be able to export all data in its raw state and import it to another tool. Free Access Guarantee: We'll always provide a feature-rich, free-for-life version of RemNote. Current users will never be asked to pay for any feature they're already using, in the feature's current state. Guaranteed Access Clause: In the extremely unlikely eve…
I already use Anki heavily for studies that require it but integration would be even more powerful - copying text snippets from a zettelkasten to Anki is unsolving the problem that knowledge-map systems are trying to solve. I’m surprised I haven’t seen a feature or plugin like this for Roam/Obsidian/TW.