Contrail is a minimal theme based on Tobias Bernard's minimal GTK theme mockup, found here
Try the Contrail Metacity theme
, too! (works with Mutter)
Also, I recommend this GTK theme
based on the same mockup that Contrail was.
Thanks to Andrew King
for suggesting the name!
The wallpaper is Hole in the wall by Toms Atte
-When using the Activities hot-corner, it often stays in the hover state when switching back to the desktop. This is a problem with GNOME-Shell itself.