1. MindMeister
   1. Pros
      1. Allows real-time collaboration
      2. Information stored online
      3. Embedded version is updated automatically
   2. Cons
      1. Free version is not sufficient
      2. Maybe not sophisticated enough
2. FreeMind
   1. Cons
      1. Not good at collaboration
3. XMind
4. 3D Topicscape (Pro)
   1. Pros
      1. Live link (e.g., insert an outlook task)