Markdeep - Advanced Markdown renderer for the browser with full diagram support
Reveal.js - A framework for easily creating beautiful presentations using HTML
Landslide - landslide - Generate HTML5 slideshows from markdown, ReST, or textile.
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.
Markdown-it - High-speed Markdown parser with 100% CommonMark support, extensions & syntax plugins.
Google Slides - Create a new presentation and edit it with others at the same time — from your computer, phone or tablet. Free with a Google account.