Mindomo is a great, free product for mind mapping. You can utilize it online for free to create some great looking and functional maps.

There is also a pro version at the great price of $6/month, which provides a desktop version, allowing you to store the files locally and organize with folders and sharing capabilities.

With the upcoming addition of collaboraiton, and there continual efforts to improve the product, it’s quickly becoming a great brainstorming and outlining tool.