An old HP laptop with Debian hosting Klipper and Home Assistant. Waiting for an OTG cable so I could replace the laptop with a phone for less power and heat

Trilium. Tried a bunch but fell in love with this one. Others either didn’t have support for inline math or weren’t wysiwyg (Joplin). Also easy syncing between computers with its own server in docker, and it even doubles as a web version of the app.