Best Apps Similar to VirtualBox

VirtualBox is an open source, cross-platform virtualization application that is used to run virtual machines on a host computer. It is available for free, but has some limitations.
VMware Player
VMware Player is a great solution for running multiple operating systems on a single laptop. It makes it possible to run different operating systems in parallel on the same PC. VMware Player is used to create a virtual machine for a different operating system, or a virtual machine can be downloaded. VMware Player is a free, single-user application that runs on a Microsoft Windows system.
Parallels
Parallels is a powerful, full-featured virtualization solution that gives you the power of Mac OS X, Windows, and Linux on your Mac. With the industry’s most advanced virtualization technology, you can run Windows, Mac OS X, Linux, and other operating systems all on one Mac.
Linus
Linus is a live CD that will help you to run an operating system that is not installed on your computer. It can be used as a means to try new things without having to go through the installation process.
Wine
Wine is an open-source software application that allows you to run Windows programs on Linux, BSD, Solaris, or Mac OS X.
WineBottler
WineBottler is an application that allows you to bottle your favorite Windows application, so that you can run it on your Mac without having to install an entire Windows operating system.