NetBSD Project has just released NetBSD v6.1.
http://www.netbsd.org/releases/formal-6/NetBSD-6.1.html
NetBSD is a free, fast, secure, and highly portable Unix-like Open Source operating system. It is available for a wide range of platforms, from large-scale servers and powerful desktop systems to handheld and embedded devices.
Regards,
Roger Lacroix
Capitalware Inc.
