There used to be a dead-simple MacOS App called Anxiety that does something similar to this but it somehow died.
I don't use TO-DO Apps to do my tasks, I calendar pretty much everything but I want a very simple task-lister for things such as "Call Ram", "Remind Kid to learn to Type", etc.
This serves the purpose.
I tried Tot[1], another interesting simple tool to do a similar function but MonkeyMind is simpler for me to for these small tasks.
Feature Request: Can we make this have a Powerpack option for Alfred. So, I can keep this running in the background but use Alfred to add tasks. This is the same request I asked the Command-E[2] guys too.