One of the most popular GTK2 themes Orta has been finally ported to GTK3 by rebek94. The theme has been designed to match closely the original Orta look.
It currently lacks customization tools/options that came with original Orta GTK2. However it looks pretty cool with Faenza Icon set. Orta GTK3 also uses Orion GTK3 theme by Satya.
This Theme can be install on Ubuntu 12.04 Precise/Ubuntu 11.10 Oneiric Ocelot.
Install it via ppa Open Terminal window and enter commands:
sudo add-apt-repository ppa:kokoto-java/omgubuntu-stuff sudo apt-get update sudo apt-get install orta-gtk-theme