The NetBSD Project recently released version 6.1 of the NetBSD operating system. In addition to many stability fixes, it provides an improved NPF, NetBSD's new packet filter with symmetric multiprocessing support. The NetBSD 6.1 release also had various hardware driver additions including LSI Thunderbolt (SAS2208) controllers, Apple's Thunderbolt to Gigabit Ethernet adapter, Hydra and ASDG Zorro2 bus network cards, and USB and onboard Ethernet support for the Raspberry Pi. Also the LSI Logic & Dell MegaRAID SAS RAID controller can now be managed on NetBSD using the MegaCLI Linux binary. The flock tool was added, inspired by the Linux program of the same name; and support for touchscreen calibration was addedto wsconsctl.
For more information see, http://www.netbsd.org/releases/formal-6/NetBSD-6.1.html.