VirtualBox 4.0.8.71778

VirtualBox is a software that allows users to run multiple operating systems on a single machine. It supports a wide range of operating systems including Windows, Linux, and Mac OS X. It provides features like snapshotting, which allows users to save a virtual machine's state and revert back to it later, and virtual networking, which allows virtual machines to communicate with each other and with the host machine. It also offers USB device support and the ability to run virtual machines remotely.