Solid Explorer - Solid Explorer is a powerful Android file manager featuring access to most popular cloud storages, root access and easy extensibility.
John's Background Switcher - Switch backgrounds to trending imgur, reddit, tumblr threads
Amaze File Manager - Free and open-source Android file manager with no ads.
Muzei - Muzei is a live wallpaper that gently refreshes your home screen each day with famous works of art.
Total Commander - A Shareware file manager for Windows® 95/98/ME/NT/2000/XP/Vista/7, and Windows® 3.1.
Variety Wallpaper Changer - Variety is a wallpaper changer for Ubuntu which is featureful, yet slim and very easy to use.