Working with binary data in JavaScript

I can show how to manipulate with binary data in browser and Node.js, how to work with any popular file formats such like images, archives, audio, video files or even realtime streams, how to use those techniques for creating full-featured offline applications with ability to view, edit, create and convert local files without any usage of native plugins (Flash, Silverlight, etc.) nor other languages except pure JavaScript that works on any modern device.