From Andrea Incani:
Fun4Word is an add-in (that is an addition) for Microsoft Word. It integrates with Word through a menu. Thanks to it amusing and funny formattings can be applied to parts of selected text or to a whole document. Fun4Word is able to write mirror words or whole sentences, to mix the words of a sentence, to remove all the vowels from the words, to color every word of a document of a different color, to give an aspect to wave to a sentence, to cipher the text. Fun4Word has 31 of these functions, had a good time trying their all.