I have to admit, I've been obsessed with the simplicity of Markdown in writing most of my business documents for a long time. When the need comes to build a quick presentation (either for work or if I'm teaching) I'll often get wrapped up in the styling and drag out the process of creating the material far longer than necessary. I just came across Marp and so far building simple presentations is a breeze and all by using the simplicity of Markdown. Currently it seems that you can only export presentations to PDF documents and present from there, I'm hoping that the developer will add a "Presentation Mode" to present right from the application. Either way, for a product that hasn't hit 1.0 yet it feels incredibly comfortable to use.