Concept-mapping or mind-mapping software programmes are very useful tools for students who have good visual-spatial ability. Information can be converted into a visual mind-map containing key information, pictures and showing connections. Students can use mind-mapping software to create visual revision aids, but it can also be used for brainstorming, concept mapping and planning essays.
MyStudyBar http://mystudybar.blogspot.com/ is a set of portable open source and freeware applications to help dyslexic students with studying, assembled into one package. It includes tools for mind-mapping, customising fonts and background colours, a talking dictionary and text-to-speech features. It is completely free to use.