Obsidian

✨Key Features

• ▸Local Markdown Storage: Notes are stored as simple .md files in folders (vaults) on your device, ensuring full ownership, privacy, offline access, and easy portability/migration without vendor lock-in.
• ▸Bidirectional Linking: Create links between notes like a personal wiki ([[note name]]), with automatic backlinks to see connections and build complex knowledge networks.
• ▸Graph View: Interactive visualization of note connections, with filtering, grouping, and local graphs to discover patterns and spark ideas.
• ▸Canvas: Infinite whiteboard for brainstorming, diagramming, embedding notes, and visually organizing ideas.
• ▸Extensive Plugin Ecosystem: Thousands of free community plugins (e.g., Kanban boards, calendars, tasks, Dataview queries, advanced tables) plus core plugins for ultimate customization.
• ▸Themes and Customization: Hundreds of themes and CSS tweaks for personalized UI; open API for advanced workflows.
• ▸Optional Paid Add-ons: Sync ($4/month annually) for end-to-end encrypted cross-device syncing and version history; Publish ($8/month) for turning vaults into customizable online sites.
• ▸Cross-Platform Support: Available on Windows, macOS, Linux, iOS, Android; no telemetry or data collection.
• ▸Community-Driven: Thriving ecosystem with no built-in AI, but many third-party plugins for AI integrations (e.g., ChatGPT, local LLMs via Smart Connections, Copilot).