Logseq
Summary
Logseq is a local-first, non-linear, outliner notebook for organizing and sharing your personal knowledge base.
Use it to organize your todo list, to write your journals, or to record your unique life.
The server will never store or analyze your private notes. Your data are plain text files and we currently support both Markdown and Emacs Org mode (more to be added soon).
Features
From logseq wiki
Backlinks