Use the free, tiny and portable LoneColor app to set any solid color you like as your Desktop wallpaper, or let it surprise you with a randomly generated color wallpaper. It has a minimal design and it is very easy to use directly from your Desktop.
Get a window frame around any image or screen area. The frame dummy looks and behaves like a real desktop window. Use it for screenshots, messages, pranks, or software development. Or even to make a fake desktop window that looks 100% real. Portable.