Obsidian

Obsidian is a knowledge management and note-taking app that stores everything as local Markdown files. It is free for personal use and has become the tool of choice for people who want to own their notes forever.

What You Get

• Unlimited notes - No limits on the number of notes or vaults
• Local storage - All files are plain Markdown on your device
• Bidirectional linking - Link notes together and visualize connections
• Graph view - See your knowledge as an interactive network
• Community plugins - Hundreds of plugins for extending functionality
• Custom themes - Change the look and feel of your workspace
• Canvas - Visual note-taking with infinite canvas

What to Know

Obsidian is free for personal use. Commercial use requires a license ($50/user/year). Sync between devices requires Obsidian Sync ($4/month) or your own solution (iCloud, Dropbox, Git). The plugin ecosystem is massive but can create a complex setup if you are not careful.