3D Card Maker is a Windows application which generates unfolded patterns for Pop Up Cards.
kirigami is a paper craft where shapes are literally brought out of paper by cutting and folding (some origami models require cuts, but those are exceptions, so to say: in kirigami, cutting is an intrinsic part of the making of the models). The models themselves can be designed either by hand or aided by the computer; in this latter case 3D Card Maker allows you to create fairly complex designs with just a little practice. All the work is done in a single window where the model is shown in 3D, and moving, rotating or scaling it is straightforward. The interface is easy to understand (first steps: move the cursor with the keyboard arrows, raise columns by pressing the space bar), and provides very useful functions, like the mirror mode, which saves half the work when creating symmetric patterns, or the animation feature, which shows how the model should be folded after cutting. Finally, you can directly print the unfolded pattern, export it as a bmp image, or even export the tridimensional model as a DXF. In all, 3D Card Maker is a very nice program which will keep you entertained for quite a long time.