Always looking for good markdown tools on Mac. Screenshot looks nice. Reminds me of HackMD. What do you mean by moderation?
For note-taking apps, it's easy to add different features by learning other great products. Moderation means preventing any feature from being introduced without due consideration. I want it to work well enough with as few features as possible, and focus on less unnecessary things.
I was looking for something just like this.
Is it open source?
Hope you will like it! It's not open source yet, whether or not may depends I think, and there's a lot of clean-up to be done before that.