This is a other very, very simple box generator mostly for laser cut, but also with SLT-Export for 3D-printing. You can also print it out, glue it on wood or what ever, and saw it out.
You can customize it with the thingiverse customizer.. Actually, if you need a dxf-file, you have to use OpenSCAD.
Note, that the variables for the size are the OUTER-dimensions. If you need defined inner dimensions, add 2x of the material thickness to each side.
With the right parameters you can assemble the box without gluing. Example: 3mm pebble plywood cor = 0.25.

Update 1.2

• Added Modus 'box' and 'shelf'
• Corrected Customizer options for 3D-printable view
• fancy random color preview