Microsoft PowerPoint - Microsoft PowerPoint empowers you to create clean slideshow presentations and intricate pitch decks and gives you a powerful presentation maker to tell your story.
Minimalist Markdown Editor - This is the simplest and slickest Markdown editor.
Ludus - Limitless creativity for your slides.
Typora - A minimal Markdown reading & writing app.
Keynote - Keynote for Mac, iOS, and iCloud lets you make dazzling presentations. Anyone can collaborate — even on a PC. And it’s compatible with Apple Pencil.
Markdown by DaringFireball - Text-to-HTML conversion tool/syntax for web writers, by John Gruber