Logseq: A privacy-first, open-source knowledge base

Logseq is an open-source, free-to-use note-taking application designed to help users organize, connect, and understand their thoughts and ideas. It features a variety of features including linked references, queries, search, flashcards, whiteboards, and more. Logseq is available for iOS, Android, and Linux devices and offers file syncing, multiple plugins and themes, and a large community of users.