Another one recently brought to my attention that I had forgotten about is Tagul. https://tagul.com
Tagul requires a free account to be created which can be created your Google, Facebook, or Twitter account or just an email address.
Teachers or students can create their own word cloud by typing in words to be added or importing a list of word. In Wordle to get the words to show up larger you would just type them in multiple times, which is great with importing text like a speech. However, if you are just wanting some of your words bigger Tagul allows you to designate the size of the word. Users can also set the color of each word, the angle, and the font. Tagul also allows users to create their word cloud as a certain shape.
Tagul also allows for a variety of ways to share your word cloud, including email, links, downloads, and embed codes.
Teacher can enter all of the student's names into the word cloud for graphics to use during the school year or a class shirt. Teachers can enter text, like to the Gettysburg address above, and have students guess the speech or event or speaker. Students can enter their paragraph they have written to see which words stand out the most in their summary or story.