Laidout is desktop publishing software built from the ground up with imposition in mind. Currently one may arrange pages into various impositions, such as a booklet, or even a dodecahedron. You can fill pages with images, gradients (linear, radial, and mesh), mesh transformed images, engraving-like fill objects, and some basic text. Export with varying degrees of success to Svg, Scribus, Pdf, and more.

NOTE: This is only to provide appimages, I am not the developer.