Obsidian (Community Plugins)

Obsidian is the note-taking app that genuinely grows with your brain. Your notes are local Markdown files, always portable and never locked into a proprietary format. The plugin ecosystem is massive — over 700 community plugins covering everything from calendar views and Kanban boards to spaced repetition. The backlinks and graph view create a visual knowledge network that reveals connections you did not know existed. What makes Obsidian special is how it serves both casual note-takers and serious knowledge workers. You can use it as a simple markdown editor, or build an elaborate second brain. The free version for personal use is fully featured. The trade-off is that the plugin ecosystem can become overwhelming, and some plugins conflict.

Good first choice if you want a practical tool without spending the afternoon reading developer docs.