A Markdown Teleprompter
It takes input in standard Markdown format and, when you press the “Prompt” button or hit Shift-Enter, it blacks the screen and renders your Markdown in large, contrasting text. Then you can hit Spacebar or Enter to start and stop scrolling. Stopping auto-scroll and using your mouse’s scroll wheel will allow you to navigate. Escape (or a click on the background) will take you back to the editor.
Very cool. You can also run it locally or on your own server. The online version is available here.