Docker on FreeBSD
The FreeBSD people seem to be on a roll when it comes to porting things. They mention a 64-bit Linux compatibility layer they recently rolled out in this post. But in addition, some iXsystems employees have ported much of the OSF Mach kernel (sans memory object/external pager interface) as a module, plus partial or full implementations of XPC, libdispatch, ASL (Apple System Logger), liblaunch and other facilities just so they can run the low-level Darwin/OS X userspace and launchd, especially. FreeNAS then wrote Cython bindings to all this for use in their system services. This is all in feature branches atm, but it should be rolling out soon enough.It's insane.