I find that when I’m studying I tend to keep notes in a form very similar to Mind Maps. I find it quite intuitive yet, I’ve never taken it a step further to look at computer information organizer software. There’s a selection of packages you can use as an Information Organizer, including FreeMind and Labyrinth which are both open source. However, I’ve come across a 3d mindmapping software review which seems to take it a step further.
Here‘s another excellent post of 3D MindMaps which includes a number of videos showing the process. The biggest problem with traditional MindMaps is that a single plane isn’t enough to show the linkages between different ideas and you end up with joining lines all over the place. 3D MindMaps solve this problem. I might just download the Personal Edition and give it a whirl.