Novelize - Novelize is an online novel writing app designed to keep authors on track.
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.
Manuskript - Open-source tool for writers.
Novlr - Online word processor and organizer for novel writing.
oStorybook - oStorybook : a free Open Source novel writing program for creative writers
Campfire Pro - Character design, plot manipulation, and world-building tool for novelists and screenwriters.