Ask HN: A single compose interface for email, notes, posts etc?

Whenever I have a thought or an idea, I find the decision of which app to open to write it down (Evernote? Twitter? Medium? Email? Todo? Wiki? Google Doc?) ends up interrupting the flow of thoughts.

I've been looking for a single compose interface (preferably something like the quick "Save to Evernote" popup window that is accessible from the Mac menubar. Something where I can first take down my idea/note/thought/message, and then select how to store/share it: e.g. store as note, create todo, send as email, tweet, start document, Medium post etc.

Does such a universal compose tool exist? If not, do you think it will be worthwhile for someone to create one?