Windows Notepad. Simple, plain text. I've developed my own annotation and formatting system (CAPS for titles, single dashes for bullets, indented dashes for sub

Windows Notepad. Simple, plain text. I've developed my own annotation and formatting system (CAPS for titles, single dashes for bullets, indented dashes for sub-bullets, triple-asterisks for follow-up, and so on). I've been using it since Windows 3.1. I use Google Keep for shopping lists because of the checkbox functionality and sync to Android, but I expect to keep using Notepad until it's sunsetted.