What non-traditional graphical user interfaces currently run on Ubuntu?
I don't mean hand-wringing over Gnome Shell and Unity, nor behind-the-scenes changes like Wayland. I mean something that the end user would experience as completely different: new interface paradigms (not just smartphone-like), 3D interfaces , clones of BumpTop or Microsoft Bob, wildly animated windows and widgets, and the kinds of things you might see only in movies.
- visuals: screenshots, links to screenshots or links to videos that demonstrate the difference between this and a traditional interface
- instructions: (or a link to instructions) on how to install them on the current version of Ubuntu
(I am not looking for examples that require exotic input devices. Something you could install and play with on a regular desktop or laptop machine.)