Shahi: a visual dictionary that Wikitonary content with Fickr images and more: Try it.

Visuwords™ online graphical dictionary — Teachers and students alike will enjoy looking up words using this easy to use online visual dictionary. Just like any ordinary dictionary you can look up words to find their meanings and associations with other words and concepts. This software produces diagrams in a networked form. You will be able to learn how words associate using this online dictionary.
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VocabGrabber
VocabGrabber analyzes any text you're interested in, generating lists of the most useful vocabulary words and showing you how those words are used in context. Just copy text from a document and paste it into the box, and then click on the "Grab Vocabulary!" button. VocabGrabber will automatically create a list of vocabulary from your text, which you can then sort, filter, and save.


Wordle
Wordle is a toy for generating “word clouds” from text that you provide. The clouds give greater prominence to words that appear more frequently in the source text. You can tweak your clouds with different fonts, layouts, and color schemes. The images you create with Wordle are yours to use however you like. You can print them out, or save them to the Wordle gallery to share with your friends. If you are struggling to 'grab' the wordle image, and you are using windows, then use this simple little tool to grab the image.Snippy