Top 3 open-source products relevant to Note Taking, Knowledge Base, Knowledge Management, and Notes

Logseq is a local-first, non-linear, outliner notebook for organizing and sharing your personal knowledge base.

Open Source free

Dendron is an open-source, local-first, markdown-based, note-taking tool built on top of VSCode. It supports all the usual features you would expect like tagging, backlinks, a graph view, split panes, and so forth.

Open Source freemium $5.0 / Monthly (Custom domain name for publishing.)

Manage your Notes from any Git Repo.

Open Source