Note-taking app for people who think in connections. All your notes are plain markdown files stored locally on your computer, not in someone's cloud. Link notes together, build graphs of how ideas connect, use plugins for literally anything. Great for building a personal wiki of all the projects you're tracking, wallet setups, farming strategies, protocol notes. The learning curve is real but once you get it, you never go back to regular notes. Free for personal use, sync costs extra but you can just use Google Drive.