I am finally upload the official port of the Glitch metacity theme, the tarball also includes GTK2 and a xfwm4 theme.
The current screenshot is not displaying the GTK2 widgets but Adwaita's GTK3 as I have moved to actually use the Gnome Shell. Feel free to port the GTK2 theme to GTK3 but I haven't got the chance to do it myself.
>> To install, extract the file in "$HOME/.themes/".
>> Thanks to Mario Arizzi aka Bzz for the xfwm4 port.
Enjoy the theme