Most of them are pretty easy to tell, but many could be done in just about any window manager. 1. Not real. 2. Mac4Lin. 3. Not absolutely clear, but note

Most of them are pretty easy to tell, but many could be done in just about any window manager. 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.