Some lovely GTK themes and wallpapers for your Linux desktop.
MediterraneanNight Series 2.03: http://gnome-look.org/content/show.php/MediterraneanNight+Series?content=156782.
Themes Collection (Ubuntu/Linux Mint): http://gnome-look.org/content/show.php/Themes+Collection+%28Ubuntu%2BLinux+Mint%29?content=156873. A huge theme collection for Ubuntu and Linux Mint.
GNOME Shell: Nord 1.8: http://gnome-look.org/content/show.php/GNOME+Shell%3A+Nord?content=142971. A very popular Gnome Shell theme.
Mintyfresh Cinnamon-theme 0.3: http://gnome-look.org/content/show.php/Mintyfresh+Cinnamon-theme?content=156287. A lovely green Cinnamon theme.
Malys Inversio: http://gnome-look.org/content/show.php/malys+-+inversio++?content=152965.
Ambiance Chrunchy: http://gnome-look.org/content/show.php/Ambiance+Crunchy?content=151181. This is the Ambiance theme for your Linux desktop. This is for Openbox as well as Unity and Gnome Shell.
Lucidity 3.0 beta: http://gnome-look.org/content/show.php/Lucidity?content=125877. The lovely Lucidity theme for a Gnome desktop.
Wallpapers.
Green hills and river wallpaper: http://www.walldigest.com/images/full/2013/12/05/hd-wallpapers-wide-pack-photos-p-wallpaper-widescreen-3d-windows-cool-abstract-desktop-backgrounds-x-free-41-33.jpg.
Artistic wheat field: http://wallpaperswide.com/artistic_wheat_field-wallpapers.html.
Awesome F14 jet fighter wallpaper: http://arminos.com/wp-content/uploads/2013/11/av8b-harrier-jet-aircraft-hd-wallpapers-widescreen-ultra-hd-military-picture-av-8b-hd-wallpaper.jpg.
Patagonia glacier wallpaper: http://wide-wallpapers.net/gigante-blanco-argentina-patagonia-parque-nacional-los-glacieres-wide-wallpaper/.
A recently ploughed field: http://hdwallpapersdesktop.com/HD-Wallpapers236/images/Photography-HD-Wallpaper-Background-31.jpg.
Metacity themes.
Fitts 0.3: http://gnome-look.org/content/show.php/Fitts?content=139285.
Windows 8.1 Modern UI metacity theme: http://gnome-look.org/content/show.php/Windows+8+modern+UI+%28metro%29?content=157024&PHPSESSID=f649f969a8d2a4773c07bb6b379d5a7e.
Win95 1.0: A Windows `95 metacity theme: http://gnome-look.org/content/show.php/Win95?content=159333.
Blended 1.6: http://gnome-look.org/content/show.php/Blended?content=26050.