Logseq v2.0.1
A privacy-first, open-source knowledge base. Outliner + Markdown + backlinks = your second brain.
Logseq is an outliner-based knowledge management tool that stores everything in plain Markdown and Org-mode files on your machine. Like Roam Research or Obsidian, it excels at bi-directional linking and graph-based knowledge. Unlike them, it's fully open-source and the outliner paradigm makes daily journaling effortless. The PDF annotation, whiteboards, flashcards, and query system are all included free. No account needed — your data is just files in a folder.