What are some alternatives?
When comparing Mind Map by RealtimeBoard and MindNode, you can also consider the following products
Whimsical Mind Maps - Fast & beautiful mind maps with real-time collaboration
XMind - XMind is a brainstorming and mind mapping application.
Atina - Simple project management tool
MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.
Hassl - A really great project management app
FreeMind - FreeMind is a premier free mind-mapping software written in Java.