Minimalist Markdown Editor - This is the simplest and slickest Markdown editor.
Draftsend - Presentations you can 👀 and 👂
Markdown by DaringFireball - Text-to-HTML conversion tool/syntax for web writers, by John Gruber
Reveal.js - A framework for easily creating beautiful presentations using HTML
Typora - A minimal Markdown reading & writing app.
Prezi - Welcome to Prezi, the presentation software that uses motion, zoom, and spatial relationships to bring your ideas to life and make you a great presenter.