Write Together - Learn to write, together, one day at a time.

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.

Kludd.co - Everyone writes.

Manuskript - Open-source tool for writers.

Joplin - Joplin is a free, open source note taking and to-do application, which can handle a large number of notes organised into notebooks. The notes are searchable, tagged and modified either from the applications directly or from your own text editor.

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