Scrivener - Scrivener is a content-generation tool for composing and structuring documents.
SuperNotecard - Introducing SuperNotecard. SuperNotecard is an online writing tool that features virtual notecards to help arrange facts or scenes, track details, organize paragraphs, and clarify your composition process.
Manuskript - Open-source tool for writers.
Pencil Project - Single-user mockup / wireframing / diagramming tool
DocxManager - DocxManager is an elegant tool for writers that are requiring any management work for the word.
Linked Ideas - A macOS/iOS apps to treat ideas as links of concepts.