Noor - Chat like you're in the office together
Xmind - Xmind is a brainstorming and mind mapping application.
Commons - Private Clubhouse for your team to collaborate and connect
MindManager - With MindManager, flexible mind maps promote freeform thinking and quick organization of ideas, so creativity and productivity can live in harmony.
ZipMessage - ZipMessage replaces live meetings with asynchronous conversations.
MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.