Recs.
Updated
Athens is open-source, private, extensible, and community-driven.
You can use Athens as a local desktop app that saves data to your filesystem or with a self-hosted server.
Eclipse Public License - v 1.0
Free self-hosted desktop app: https://github.com/athensresearch/athens/releases
Paid tiers available through https://opencollective.com/athens
Try the demo at https://athensresearch.github.io/athens
Docs viewable at https://app.gitbook.com/@athensresearch/s/handbook/
https://github.com/athensresearch/athens
SpecsUpdate
Pros
Pro You can use Athens as a local desktop app that saves data to your filesystem or with a self-hosted server
Pro You can modify Athens's source code. We are also building a plugin system for custom themes, keybindings, and integrations with other data sources
Pro Athens has [[bidirectional links]] and ((block references))
Take notes on anything from any page. Just [[link]] or ((reference)) another page or block - and voilà! - you can now go to this page and see all the places that linked back to it. The next time you press [[ or ((, you will be indexing through your previous notes, helping you connect the dots. You've started creating a graph of your knowledge!