Icons8 Lunacy 9.2.1 is a versatile design tool that facilitates sketching and visual editing for Windows users. With the capability of working offline, it offers a comprehensive asset library, including illustrations, photos, and interface elements. The software supports all major sketch file formats, allowing users to open, edit, and save them on Windows platforms. Additionally, it has built-in design components and styles, making it easier to create and manage projects. The software also integrates with other Icons8 applications for easy access to design resources.