VirtualBox is described as 'Open source virtualization tool supporting x86/AMD64, runs on Windows, Linux, Mac, Solaris. Offers portable, lightweight, ad-free use' and is a leading Virtualization tool in the network & admin category. There are more than 50 alternatives to VirtualBox for a variety of platforms, including Windows, Linux, Mac, BSD and Web-based apps. The best VirtualBox alternative is QEMU, which is both free and Open Source. Other great apps like VirtualBox are VMware Workstation Pro, VMware Workstation Player, WinBoat and virt-manager.