1. MindMeister
   1. Web Application, Free
   2. https://www.mindmeister.com
2. MindJet MindManager
   1. Windows/Mac, $349
   2. https://www.mindjet.com
3. Xmind
   1. Windows/Mac/Linux, Free
   2. https://www.xmind.net
4. FreeMind
   1. Java, Free
   2. http://freemind.sourceforge.net
5. iMindMap
   1. Windows/Mac/Linux, $100-310
   2. https://imindmap.com