Xmind - Xmind is a brainstorming and mind mapping application.
Mindmapper - Be more creative and get more done. Process your thoughts with a mind map and implement with a planner.
MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.
Coggle - Coggle is a simple, beautiful, powerful way of structuring information.
MindManager - With MindManager, flexible mind maps promote freeform thinking and quick organization of ideas, so creativity and productivity can live in harmony.
mind42 - Mind42 is a free online mind mapping software.