Who says that widgets need to be useful? Certainly not Curious Media, the creators of Mr. Alligator. Mr. Alligator sits in your Dashboard and waits to be clicked on. When someone clicks on him a random sentence, pulled from words in a database, is displayed. Mr. Alligator can also speak the phrases using any of OS X's built in voices, but I find them annoying.
You can also add words to the database, and if Mr. Alligator says something truly profound you can copy it to the clipboard without leaving the widget.
Pointless? Yes. Fun? Yes.