Dabble Writer - Writing software for novelists.
Microbit - BBC's handheld, programmable computer given free to UK kids
Manuskript - Open-source tool for writers.
Novlr - Online word processor and organizer for novel writing.
SHAXPIR - A modern cloud workspace for fiction writing & worldbuilding
Scritika - Scritika is advanced-level writing software that helps the writer to tell their stories in a creative and smart way, and it encourages you to compose the stories quickly.