MindMeister – Collaborative Mind Mapping
https://www.mindmeister.com/

MindMeister is an online mind mapping tool that lets you capture, develop and share ideas visually. More than 4 million people already use their award-winning mind map editor for brainstorming, note taking, project planning and tons of other creative tasks. MindMeister is completely web-based, which means there’s no download and no updating! Whether you’re working on Windows, Mac OS or Linux, you can always access your mind maps right inside the web-browser. This will be added to Entrepreneurial Resources Subject Tracer™. This will be added to the tools section of Research Resources Subject Tracer™.