Wallpapers do a great job of dressing up phones to make them look less mechanical. 

Some people opt to use an image of their favorite artist or a cute dog for their wallpaper. There are also those who prefer to use beautiful sceneries.

If you're one of the latter then you would love this application. It contains a huge library of beautiful pictures of trees, roads, mountains, the sea, the sky, etc., and you can use any of it for free.

All you have to do is download this android app, select an image that you like, and set it as your phone's wallpaper.