I recently purchased an Intel Galileo Gen 2 at a garage sale. I had no clue what it was when I bought it, but the guy only wanted 5 bucks for it, so I took it home, seeing as it was in its original packaging and never used.
After doing more research, it's basically an Arduino Uno sharing a PCB with a P5 Pentium (but clocked 100MHz higher, 400 instead of 300). Come to find out, you can run Linux on it! So that's exactly what I did. I flashed the Debian 7 image to a brand-new 32GB micro-SD card and it's working well enough so far, but it took some fiddling to get it there.
Originally when I got it, I tried to use it just as an Arduino just to make sure it worked. So I installed the Arduino SDK and got it all set up and all of a sudden, it won't compile. After consulting multiple forums, the Intel i586 compiler is broken, so it doesn't work on macOS. The one time where I don't have a Linux machine on hand, I swear.
So after that hurdle, I installed Debian on the SD card and it was working ok, but the sources.list was broken, so I've included mine here for download for anyone who needs to set one of these up with the galileo-linux tar file on SourceForge. I installed telnet, telnetd, ftpd, and systemd (since the img I guess doesn't come with systemd, for some reason)
But either way, I now have a fully functional mini Debian machine for whatever I want to do with it.