NAS4free^WXigmaNAS
After the split, I stayed with NAS4free (now called XigmaNAS) mostly due to painless upgrade from old, no longer supported FreeNAS installation. N4F has been utterly rock solid (now that I said that, I better ensure backups are good) on old N54L microservers.
FreeNAS (iXsystems branch) seems a solid product too, just slightly different direction/priorities than XigmaNAS. Admittedly my personal preference is to stick with FreeBSD as I do with most servers unless there is compelling need to use Linux.
Biting the hand that feeds IT
