I was just checking searched statistics.
1) Freenas 90,500 /month
2) Openmediavault 49,500/month
3) Unraid 33,100/month
4) Rockstor 5,400/month
5) Nas4free 2,100/month
Most popular search areas world wide:
Most popular search areas in the US
Sorry, it doesn't allow me to do regions of Europe or other continents separately. Just countries.