The Visual Thesaurus is an interactive dictionary and thesaurus which creates word maps that blossom with meanings and branch to related words. Its display encourages exploration and learning. Available both as a desktop version and a web version. Additional features of Visual Thesaurus include Spelling Bee and Vocab Grabber. Spelling Bee: User is challenged by a series of words, with the spelling difficulty adapted to the user's individual skill level.
iThoughtsHD is a mind mapping tool for Windows, Mac, iPad and iPhone.
Mindmapping enables you to visually organise your thoughts, ideas and information.
Features of iThoughts:
SimpleMind is a cross-platform mind mapping tool that allows users to organize thoughts and ideas in multiple maps; users can also add media such as images, videos, and voice recordings to their mind maps.