TBS Cover Editor is used to create the boxes in which software is shipped to customers. This particular application looks very advanced and, at first sight, one would say that it is for professional graphic designers only, but one would be mistaken.
The design of the boxes is made in a 2-dimensional plane. So, the user is not to worry about 3D modeling. Instead, the users works in 2D mode and designs a box. There is a real-time 3D preview on the top right part of the screen that shows a graphical representation of what the box will look like in 3D, which changes every time the user changes the 2D image.