This was a just-for-fun 3D model I made a few years ago and I don't think I ever actually finished it. The main shape is similar to the Millenium Falcon, but it was never intended to be a replica of it.
I believe I initially sculpted it in 3D Coat and used some free content packs for some of the details. I then took it into LightWave 3D and added more features and details, many of which were made using the Quad Panels plugin from liberty3d.com.
The print in the photos has a line in the middle because I stopped the print when it was about halfway and continued it the next day. I didn't want to let it run overnight in case it disturbed the neighbors.