John's Background Switcher - Switch backgrounds to trending imgur, reddit, tumblr threads
Triangle Draw - Create awesome graphics.
Wallcat - Enjoy a new, beautiful wallpaper, every day.
Isometric - Create beautiful, abstract works of art & optical illusions
Splashy - Breathtaking, auto changing wallpaper app for macOS, Windows, Linux, iOS & Android
Grid Paint - Online grid-based paint program offering squared, triangular, and hexagonal grids.