i have been using marp lately.

i really liked the live preview and the output to pdf.

i do prefer pdf over web-based presentations because they are easier to share without a webbrowser (just send a document) (and they can still be viewed in a browser).

most irritating was the fact that i could not use my preferred editor. i haven't checked all the recommendations here, but i'll be looking for a combination if something like markdown in vim with live preview in a browser or pdf viewer