Unity/Gtk2.0/Gtk3.0/Metacity Theme based on elementary Gtk2.0/Gtk3.0/Metacity. Gtk3.0 has been almost completely rewritten from scratch and modified with unity panel support while retaining the elements that make that theme awesome.
Full credit to elementary team for their inspired design.
Fixed issue with file-chooser sidebar items behaving glitchy
Gnome Shell/Gnome Classic variation included.
Simply extract the folders into .themes and use gnome tweak tool to change to the appropriate theme depending on your desktop.
-Thunderbird toolbar uses selected_fg_color and therefore uses white text. Either all gtk2.0 menus must be light so that selected_fg_color can be dark or thunderbird has white text. I haven't found a way to fix it after hours of tweaking.
For gnome3 classic and gnome shell use ElementsGS theme included.