I have been using Mindomo for the last few years, and I am very happy with it. It does all I need from a mindmapping tool and more, being also an excellent and unique presentation tool.
I have used Mindomo both for workshops and webinars where I have had to explain and illustrate complex processes, as well as to showcase real-world examples and applications.
I find it very useful to be able to integrate most any type of content in a mindmap node and to be able to title it, illustrate it and annotate it with all of the resources I have.
As I continuously test new tools and am a frequent present I have chosen Mindomo over similar tools and after having been a long-time user of Mindmeister.