There’s a lot of website provides free downloadable desktop wallpaper. But none of it in any way like Simple Desktop, that shows you a very clean interface of wallpaper thumbnails so that you focus more on choosing the right wallpaper for you, rathan than disturbing or complicated layouts. Its also makes you very easy to download any of the wallpaper, either click on it, or you can use the ol’ right click “save target as” option. They serve only one-size-fits-all resolution of 2560×1600 which is good enough for most modern desktops.
For designers, you can submit your wallpaper design to them easily through the submit menu. Just make sure your design meet their criterias since the site concept are to maintain simplicity and provide high quality wallpapers.