Smoove is a ShapeShifter theme that changes the entire graphical appearance of Mac OS X. This theme uses only two beige colors and was designed to be a teaching aid for using ThemePark. It includes a Toolbar Icon Set, Safari App Skin, Desktop Images and a Synergy Button Set.
I do not consider this theme ugly. Indeed, I consider it a refreshing alternative to the blue-dominated and metallic look of Mac's standard designs. But the menus would benefit from a stronger contrast.