This is basically the same Galaxy GTK theme I found on art.gnome.org, but I noticed a couple of contrast issues with some prelight statements and corrected them so that they'd look right, at least in Xfce.
If you are an Xfce user and want the titlebar, it can be found on the third from last page of the "Xfce themes" section on Xfce-Look.org.
This is, BTW, the default look of the first Linux distro I ever used, which was Mandrake (now Mandriva, of course).
Lastly, this theme includes both GTK 1 and GTK 2 versions of the theme.
Without further ado, enjoy! :-)