A new BSD on the block is ChaosBSD that intends to serve as a testing distribution for unfinished and broken drivers not suitable for upstreaming to FreeBSD proper.

ChaosBSDD is a downstream fork of FreeBSD that is self-described as:

"A Driver Proving Ground

ChaosBSD is a fork of FreeBSD. It exists because upstream cannot, and should not, accept broken drivers, half-working hardware, vendor trash, or speculative hacks.

We can."