I got excited but #1 is a mockup
By the way, if anyone likes #3, it can be easily pieced together with:
* Mire v2 GTK theme (http://gnome-look.org/content/show.php/Mire+v2+themepack?con...) with the included Emerald window decorator theme
* area o.42 icons (http://gnome-look.org/content/show.php/area+o.42+SVG+icon+th...)
* gnome2-globalmenu (http://code.google.com/p/gnome2-globalmenu/) for the OS X unified menu bar
1. Not real.
2. Mac4Lin.
3. Not absolutely clear, but note that thunar's internal menus are displayed in the toolbar instead of the window, like a mac. It could be Mac4Lin again, but I'm guessing it's not real, unless there's something about thunar I don't know.
4. Enlightenment.
5. Pekwm.
6. Enlightenment.
7. Could be anything. It does have a Gnome footprint on the bottom right, though, so I'd guess metacity.
8. Fluxbox. (yay!)
9. I'm not sure. Probably compiz-fusion.
10. Could be anything.