OpenSolaris is an open source operating system based on Solaris from Sun Microsystems. This is a huge community-driven operating system that is governed by Sun. The latest version of OpenSolaris titled 2009.06 should be out by the time you read this, and is aimed at users, developers, as well as deployers.
Firefox 3.1 beta comes preinstalled with this OS. Along with that users can quickly backup directories using Time Slider — a new application that allows users to view graphs of what they have been up to on the PC, and where they have spent most of their time. The OS also adds support for network virtualization and Sun has also provided the OS for laptops. The final build is due around the time you read this, stay tuned for our impressions of it.