Wallup provides thousands of free images by Unsplash community right at your fingertips.
Wallup also serves as an unofficial client for Unsplash hence you manage your profile & images right inside wallup with various other features too. If you are interested in wallpapers then Wallup serves as a great option. Use Wallup to view download images & even set them as you device wallpaper. All the images can be used both non-commercially & commercially as per Unsplash license and guidelines.