Obsidian

Obsidian is a knowledge management and note‑taking application that organizes information as a network of interlinked plain-text Markdown files stored locally on your device. At its core, Obsidian lets you create, edit, and structure notes in folders while connecting them through bidirectional links and tags, turning your notes into a navigable knowledge graph. A graph view visually represents relationships between ideas, helping you discover patterns and related content across your workspace.

Key capabilities include powerful search and filters, backlinks, daily notes, and customizable templates for repeatable structures such as meeting notes, research logs, or project briefs. Obsidian supports a robust plugin ecosystem and community themes, enabling features like task management, spaced repetition, kanban boards, and integrations with external tools, depending on your workflow. All data is stored as local Markdown files, giving you control over your information, versioning, and backup strategy, with optional paid sync and publishing services if you need cross-device access or a public knowledge base.