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.

Twine - Twine is an open-source tool for telling interactive, nonlinear stories.

Manuskript - Open-source tool for writers.

Arcweave - Arcweave is the first browser based cloud professional tool for game and narrative design.

Novelize - Novelize is an online novel writing app designed to keep authors on track.

Dialogue Designer - An easy to use but powerful tool for creating branching dialogues for games.