gnome-themes-extras binary package in Ubuntu Trusty amd64

 This package contains a few nice contributed themes for the GNOME
 desktop. It includes the following global themes:
 .
  * Darklooks, a dark version of the standard Clearlooks theme.
  * Unity, a smooth and rounded theme.
 .
 It also includes some icon themes for the desktop:
 .
  * GNOME Alternative, which is similar to the standard GNOME icon
    theme.
  * Foxtrot, a simple theme in yellow tones.
  * Dropline Neu, a flashy and colorful theme resembling Dropline
    GNOME.
  * Gion, an original and sober theme.

Source package