Word clouds are a fun way to show words, where the most important ones are bigger than the others.
I may be so bold to say that this is much better than Wordle. You can save the Word Cloud as long as you have an email address. Once saved you can then download it as a decent sized image (advantage 1 over Wordle). You can also embed the word cloud (advantage 2).
All word clouds have a fairly discrete tag on the bottom right corner.
See on worditout.com