Storyheap - Manage your SnapChat and Instagram stories.
Storrito - Schedule Instagram Stories from your web browser - FREE Beta
Unfold - Create beautiful and engaging stories with minimal and elegant templates. As well as a landingpage for all your links
Stori - The best way to analyse your Instagram Stories ๐ ๐ฆ
Infinite Stories - Instagram story generator
Storyly - Bring superb stories to your app