OpenSolaris is a community developed open source version of the Solaris operating system. It was started as a fork of Solaris 10 source code and is licensed under the Common Development and Distribution License. Project Indiana was a major release of OpenSolaris that brought package management and other features from Linux distributions. Sun xVM VirtualBox is a virtualization software originally developed by Innotek that allows running multiple operating systems concurrently on a single machine.