Hi Daniele
The frame is opensource you can find the CAD data here if you wish you make one yourself.
Other opensource machines in the past are here bonne | Autodesk Community Gallery
We don’t have a github etc but if you want to build one yourself and have any questions just ask 
We had hoped one day we would be able to hire a developer and continue work on smoothie and laserweb, but sadly we are not yet in that position.
We use Attribution-NonCommercial-ShareAlike 4.0 International for the license