SPACECRAFT THAT SURVIVED SOLAR SYSTEMS
The following sideshow is based on the hypothesis that surviving aliens will be post-biological, living in space rather than on planets (for an explanation of this, see Fermi's Paradox: a possible solution).
The internet is filled with fantastic artist impressions of futuristic space craft. I selected the images that best fit the hypothesis that non-biological aliens could utilize anything as their body, including starships, or in data centers stored in space colonies deep in space. For these reasons, I used images of spacecraft without planets and stars in the background or that looked designed for biological humanoids.
Because of the problems of crediting the artists (many of sources provide no names), I included the URL address where the image can be found inside the comments section in each image. All of the images were found in Google's image area.