Ars Technica posted a gallery of all Ubuntu flavors
In addition to the many Linux distributions such as Fedora, Debian, or OpenSuse, there is a thriving open source community maintaining desktop operating systems based on Ubuntu code but with different user interfaces. These often have whimsical names like "Kubuntu" and "Xubuntu." While you can download the standard version of Ubuntu and apply a different user interface to it, most of these alternative distros are built with a non-Unity interface in mind from the start.The flavors of Ubuntu from A to Z or at least from Kubuntu to Xubuntu
Just for fun, we're going to take a look at the different "untus" users can choose from. In particular, we'll focus on the "recognized flavors" that are part of the Ubuntu project—you can find links to more information on each of these and downloads on the Ubuntu wiki.