Another great thing about FreeBSD is it's not too hard going the other way: Embedding FreeBSD is a robust choice, one that can take you quickly to market as it did for me and a GPS on golf cart project I did in the late 90s with it, busybox, and some valuable help from PHK on getting support for the weirdo LCD panel the suits picked (we had to turn the panel upside down in the cart, the viewing angle was atrocious).