"The IBM Word-Cloud Generator (WCG) is a Java application that creates word clouds from your source texts. It's built on the same technology that powers the popular "Wordle" web application. "
There is a local (untested) installation of this on gnode1 at /usr/local/bin/IBMWordCloud/.
"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."
No local installation available (or possible as far as I can tell). However, there is the option to use Wordle over http post.