Phoronix: Grand Central Dispatch Comes To FreeBSD

Apple's Grand Central Dispatch technology introduced in Mac OS X 10.6 "Snow Leopard" was open-sourced under the Apache license last month by Apple and now it has worked its way into FreeBSD. This software, which helps in optimizing applications for multi-core systems, has ported the libdispatch library from GCD to FreeBSD and made Grand Central Dispatch more POSIX friendly. Additionally, a Clang compiler package that is blocks-aware is also available, which can run well in a GCD environment...

http://www.phoronix.com/vr.php?view=NzYwOQ