The GTK3 theme supports Gnome 3.8, 3.10 and 3.12, but the Gnome Shell theme only works on 3.10 and 3.12. Also the tabs you are seeing in nautilus, gedit, etc. are only for Gnome 3.12 due to the reworked tab system in this version.
A Chrome/Chromium theme is included.Requirements
gnome-themes-standard package for the GTK3 theme. Murrine and pixbuf engines for the GTK2 theme.
For installation instructions please read the included README.Other Info
Check- and radioboxes are from GTK3+Gnome Shell - Faience
Icons used in the preview:White-Pixel-Icons
by darkdawg plus some additional icons i made with inkscape
Folder icons are recolored elementary Icons
Gnome-Shell: Fixed ibus candidates list
Gtk: Added tab styling to the dark theme
Proper chromium frame colors
Added alternative metacity theme (buttons in maximized window are now visible)
Minor bugfixes and improvements