An awesome flashcards (spaced repetition) and note taking app (not yet).
You can find a demo version at jinbook.org (only for desktop browsers).
It is kinda slow but optimizations are possible and I want to make a proper desktop application.

• Free
• Secure
• Open Source
• Possibility to use it in all (or most) operating systems and devices.
• Rich plugin system.
• Custom spaced repetition algorithms
• Possibility to switch to and from other SM applications easily

And I have motivation to build something like that, so stay tuned) You can DM me in telegram (@selopenapela) if you have any questions.

• Anki
• Supermemo
• workflowy
• vimflowy.

Work in progress!