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The folks who make iA Writer have one as well: https://ia.net/presenter

I lack words to adequately express how much I prefer Presenter to something like Keynote or Google Slides. It’s just brilliant, and they put a huge amount of thought into making the output look beautiful.

Bonus points for being able to export in PDF, Word, etc. in various combinations of with/without speaker’s notes, ruled notetaking sections ok each page, and a bunch of other pleasant details.

I also wrote an app like that (macOS only)

https://hyperdeck.io/

I also recommend https://sli.dev/ it’s pretty batteries included and mdx based

I built presenterm (https://github.com/mfontanini/presenterm). Also a terminal based presentation tool which uses markdown, and supports images, PDF exports, etc.

For Sublime Text users, there’s a package called Markdown Slideshow that works well.