Manuskript - Open-source tool for writers.
Storyboard That - Storyboard That is the world's best online storyboard creator.
StoryMill - Developers and publishers of Mac, Win, and iOS productivity, home and office and writing software such as MacGourmet, Paperless and many more. Based in MN.
Storybird - Visual storytelling community
Novelize - Novelize is an online novel writing app designed to keep authors on track.
Microsoft Cortana - Microsoft Cortana – Digital Assistant app brings a smart assistant to your smartphone to help keep track of the important stuff, introduced by Microsoft.