Storyly - Bring superb stories to your app
Storyheap - Manage your SnapChat and Instagram stories.
Zuck.js - JavaScript library that lets you add Stories everywhere
Unfold - Create beautiful and engaging stories with minimal and elegant templates. As well as a landingpage for all your links
InAppStory - Engage your customers with Stories right from your app or mobile web product with InAppStory.
Stori - The best way to analyse your Instagram Stories ๐ ๐ฆ