macstack

https://www.makeuseof.com/open-source-a ... uch-cloud/

Sometimes you just need an app that doesn't ask you to install anything, create an account, or send data to a server somewhere. There's no need for all of this if you just want to write a quick note, make a single-use to-do list, or create a simple diagram that you don't intend to leave your computer. A web app that stores everything locally can do the trick, and luckily, there are several options that can cover a wide range of scenarios.