Draw - from a quick sketch to a complex plan, Draw gives you the tools to communicate with graphics and diagrams. With a maximum page size of 300cm by 300cm, Draw is powerful tool for technical or general posters, etc.
Scribus - Scribus is a desktop publishing (DTP) application.
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.
Affinity Publisher - Professional desktop publishing app
vym - VYM (View Your Mind) is a tool to generate and manipulate maps which show your thoughts.
Xpublisher - Xpublisher is a content publishing software that helps you to structure your content and then allows you to easily publish the content on various platforms.
Freeplane - Freeplane is a powerful and free software for building mind maps.