Steller - Everyone has a story to tell. Tell yours with photos, videos, and text.
Storyly - Bring superb stories to your app
Startups Anonymous - Anonymously ask questions and share stories. AA for Startups
InAppStory - Engage your customers with Stories right from your app or mobile web product with InAppStory.
Yarn - Yarn is a package manager for your code.
Zuck.js - JavaScript library that lets you add Stories everywhere