A Morphous PDF document can mix any number of shapes in one file. Each canvas declares its own boundary, so a single .mpdf can hold a die-cut cover badge, an octagonal certificate, and a normal letter page side by side.
The renderer emits one PDF page per canvas at that canvas's actual dimensions — so when you print, your circle prints as a circle, your hexagon as a hexagon, and your letter sheet as a letter sheet. No retrofitting rectangular paper.
Try it: open the editor, drop in a custom boundary path, and watch text auto-wrap inside the new shape.