Backgrounds offers hi-res downloadable wallpapers ranging from photos (landscapes, cars, puppies) to swirling psychedelic abstractions. Browse recent additions or dig in by category.
WIRED Updated frequently. Android version has convenient Set as Wallpaper button (iOS users must save to a library first).
TIRED Not curated — at least not by anyone with taste. You have to wade through horrible kitsch to find the good stuff. Banner ads obscure images on iPhone and iPad versions.