Tazti is a free lightweight speech recognition program that allows the user to navigate social networking sites (MySpace, Facebook, etc.), control iTunes, search Google and YouTube, manage bookmarks, and more through simple speech commands. Tazti cannot handle full-text dictation, but will allow a user to surf the web using only their voice.
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.