FreeMind is a premier free mind-mapping software written in Java.
MindMeister – Leading Online Mind Mapping Software. Millions of users collaboratively brainstorm & work on mind maps. Web ✓ iOS ✓ Android ✓ Try for free!
Coggle.it – The clear way to share complex information. Coggle is a collaborative mind-mapping tool that helps you make sense of complex things. Create unlimited mind maps and easily share them with friends and colleagues.
XMind is the most professional and popular mind mapping tool. Millions of people use XMind to clarify thinking, manage complex information, run brainstorming and get work organized.
Mindomo – Create mind maps, concept maps, outlines and Gantt Charts to improve your thinking and learning. Web, Desktop, iOS, Android. Mind map with us for free!
With MindManager, move from brainstorming to planning to execution in a single application.
Analyze your thoughts and structure them with SimpleMind.
Freeplane – Free mind mapping and knowledge management software.
TreeSheets is an open source, free form data organizer (hierarchical spreadsheet).