OpenSolaris 2009 2009.6
OpenSolaris is an operating system (OS), an open source project licensed under CDDL, and a community.
The project's goals are innovation, collaboration, and the extension of OpenSolaris technology.
OpenSolaris is free, open source, and well-suited for desktops, laptops, servers, and data centers. The quality requirement of OpenSolaris is perhaps best stated as Production Ready All The Time.
See homepage for 64-bit version and older distributions.