What is the relationship between Intel and FreeBSD in regards to igb(4)?

[Tanel Rebane]

Kevin and Jack, thank you both for your replies. As you might have guessed,
I was asking because I'm looking into buying a whole bunch of NIC's and I
feel much more reassured now. Yet, there is one additional question, as I
mentioned, I couldn't find much in src/sys/dev/igb, is the source for igb
to be found elsewhere in the src?

Happy Holidays!
Tanel