Mind 42 have just released a free on-line mind mapping tool, The sign-up is fast and you’ll be mapping in no-time. It’s easy to use, offering some basic functions, but more are on the way. A great feature is the ability to collaborate by sharing your maps, coupled with other tools like basecamp (for project management) and you can have great control and communication around your project, especially if it’s open source and the team is at disparate locations. collaboration.