Mindomo is a versatile Web-based mind mapping tool, delivering the capabilities
of desktop mind mapping software in a Web browser - with no complex software to
install or maintain.Create, edit mind maps, and share them with your
colleagues or your friends.
Store and Organize your research and information, accessible anywhere with an Internet connection.Understand your information by storing and viewing it in a interrelated form.
Bubbl.us is a FREE mind mapping application. It's similar to Kidspiration and Inspiration, but it is a Web 2.0 application. Kids can create and share projects. They can also work collaboratively on projects. Easy to use. Try this one out.