Xmind - Xmind is a brainstorming and mind mapping application.
Freeplane - Freeplane is a powerful and free software for building mind maps.
MindNode - Delightful Mind Mapping for your Mac, iPad and iPhone. MacCapture Your Thoughts. Any idea starts with a loose collection of .
Linked Ideas - A macOS/iOS apps to treat ideas as links of concepts.
MindManager - With MindManager, flexible mind maps promote freeform thinking and quick organization of ideas, so creativity and productivity can live in harmony.
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.