Even at the computer I prefer to have pen and paper. Drawing by hand triggers more of the intelligences and more memory threads than skipping around from one computer window to another. For neatening mind maps for sharing. I like iMind Mapping and Mind Genius along with my personal library of clippings. What you get for images are not quite enough but both these programs allow you to import your own.
Mind mapping on the computer lacks the creative letting and doodles that I do when mind mapping.
Alex