Prefer - Professionals you need, from people you know
Xmind - Xmind is a brainstorming and mind mapping application.
Warmspace - Tech-powered conversations that transform relationships in work and life.
MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.
Introwise - All-in-one scheduling and business management platform for coaches, tutors and consultants to run their business online.
Coggle - Coggle is a simple, beautiful, powerful way of structuring information.