Microbit - BBC's handheld, programmable computer given free to UK kids
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.
Novlr - Online word processor and organizer for novel writing.
BlankPage - Stay motivated to write, and finish your story
Dabble Writer - Writing software for novelists.
Manuskript - Open-source tool for writers.