Mind42 – Free Online Mind Map
http://www.mind42.com/

Keep track of all your ideas, whether alone, with colleagues and friends or working together with the whole world. mind42.com is a browser based online mind mapping application. With mind42.com installing mindmapping tools is no longer needed- for a hassle-free mindmapping experience. Just open the browser and launch the application when needed. This has been added to the tools section of Research Resources Subject Tracer@trade; Information Blog.