Story Stork tries to make the process of plotting standard story beats (taken from concepts like 'the story clock' and 'Save the Cat!') in an early draft easy and fun. You get to roll through creating an outline with a chat-like UI (thx to Product Hunt veteran BotUI), complete with the story of Titanic retold through GIFs to help illustrate each plot point.

Strike for macOS is a powerful outlining app that offers collaborative editing, attachment management, and smart text features such as Markdown support and the use of tags.