MindMeister (mind mapping) - a Great app that not only will be able to organize your thoughts and place them in the right categories, but also to organize the work of a small group of people. You will be some sort of networking, which will be recorded your thoughts, and with a set of built-in icons and images, you'll be able to visualize these thoughts, thus you will be able to navigate this application. Create your own projects, or shared, where everyone will have the opportunity to make their adjustments.