Getting copyright free desktop wallpaper is sometimes not easy, with those available often having time limits or requiring fees for permanent use.
TyphoonWallpaper, however, is a free tool that offers access to hundreds of high resolution wallpaper images. TyphoonWallpaper allows you to select a range of images that it will later cycle through automatically while you are using your PC so that you'll always have a fresh desktop.
What's particularly nice about TyphoonWallpaper is the fact that the images are not only incredibly high definition but it also supports dual monitors meaning you can have alternative desktops on different monitors attached to your PC. This even extends to three monitors connected - great for video editors. The wallpapers don't contain adware although they do feature links to try and lure you to buy more products from the developers but it's a small price to pay for some great images.
There might not be many images to choose from when compared to other desktop wallpaper sites but TyphoonWallpaper offers great images on as many monitors as you need to cover.