Chris King Universal Hubs, blue with standard six bolt rotor adapters.
You can buy different adapters if you want to run different disks. Specs
can be found here:

Currently built on a beefy front rim and a Mavic 317 in the rear. I
know, rear rim is cheese but it's what I had at the time and I didn't
have a lot of money. Rear hub has been upgraded with fun bolts.
Make me an offer, bike related trades ok especially if you are dumping a
fat bike.

$450 obo