adapta-backgrounds : A set of backgrounds ( https://github.com/adapta-project/adapta-backgrounds )
adwaita-icon-theme : GNOME default icon theme ( https://git.gnome.org/browse/adwaita-icon-theme/ )
elementary-icons-theme : An original set of vector icons designed specifically for elementary OS ( https://github.com/elementary/icons )
elementary-sound-theme : A set of system sounds for elementary OS ( https://github.com/elementary/sound-theme )
elementary-theme : The Gtk+ Stylesheet for elementary OS ( https://github.com/elementary/stylesheet )
elementary-wallpapers : Wallpapers for elementary OS ( https://github.com/elementary/wallpapers )
gnome-backgrounds : A set of backgrounds packaged with the GNOME desktop ( https://git.gnome.org/browse/gnome-backgrounds )
korora-shell-theme : a Korora tweaked Gnome shell theme ( https://kororaproject.org )
plano-theme : plano theme for GNOME, Xfce and more. ( https://github.com/lassekongo83/plano-theme )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a gnome-next
For Paludis use this rsync : rsync://gentoo.zugaina.org/gnome-next-portage
If you have a problem : ycarus(-at-)zugaina.org