I mentioned that some Mindmap programs could be executed online yesterday. Actually, my favorite is Mindomo that allows users to create 7 diagrams for free. It possesses beautiful UI looking like MS office 2k7. Moreover, lots of icons and images are included. However, it's not cheap if you want to communicate with friends or colleagues.
Fortunately, there is a free jave-based mindmap software named FreeMind. I'm not familiar with MindManager; therefore, i can tolerate any difference between FreeMind and MindManager.
Mindomo: