If i want to make quick free-form notes about things, I use Notes.app (the Apple app). I don't have to "explicitly save" it, it has hierarchy, and it has rich t

If i want to make quick free-form notes about things, I use Notes.app (the Apple app). I don't have to "explicitly save" it, it has hierarchy, and it has rich text if i want it. If I'm writing more thought out, structured information (e.g. I'm using this method to define the deliverables/goals/basic use for my company's software packages) I use a VCS repo with markdown files in it. This allows me to link between the documents, and when I get around to it, make it accessible via a simple wiki tool like Gollum. This is the opposite of your 'no specific saving' thing though - you have to not just save it, but also commit and push.