A modular VM solution that lends itself to integration and customization, VirtualBox supports Windows, Mac OS X, and various Linux distributions as hosts while providing a VMware-like laundry list of supported guest OSes. With version 1.5.0, VirtualBox introduced seamless windows, a knock-off of the Coherence and Unity features of Parallels and VMware Fusion, respectively. The VirtualBox implementation, however, represents the first time the capability has been available under both Windows and Linux. FULL REPORT ...