Dark themes for Ubuntu and Gnome
http://sourcedigit.com/9432-top-10-best-custom-themes-ubuntu-14-04/
http://kb.openstudioproject.com/content/ubuntu/best-ubuntu-1404-trusty-themes
http://www.sundman.ca/themes/yosembiance/
http://www.ravefinity.com/p/vibrancy-colors-gtk-icon-theme.html
http://askubuntu.com/questions/454372/dark-gtk-theme-for-ubuntu-14-04
http://www.webupd8.org/2013/07/slick-gtk3-theme-numix-updated-with.html