Obsidian

Obsidian is a markdown‑based note‑taking and knowledge‑management app that stores all files locally, giving you full ownership and offline access. It features powerful linking, graph visualisation, an infinite canvas, and thousands of community plugins and themes to customise your workflow. Optional Sync provides end‑to‑end encrypted syncing, version history, and collaboration, while Obsidian Publish lets you instantly turn notes into a public wiki or digital garden.