Mac users interested in Vmware fusion v5.0 free trial generally download:
Access a virtualization environment and run various OS, like different versions of Windows or Linux on your Mac. Assign an IP address in your home network to your virtual machine and transfer files between operating systems. Run a virtual machine in full-screen or in the Unity mode that simulates macOS on other platforms.
VirtualBox is a family of powerful x86 virtualization products for enterprise as well as home use. Not only is VirtualBox an extremely feature rich, high performance product for enterprise customers, it is also the only professional solution that is freely available as Open Source Software under the terms of the GNU General Public License (GPL).
VMware Importer is for Mac OS X users who have been working with virtual machines created with Parallels Desktop or Microsoft Virtual PC, but who want to use those virtual machines with VMware Fusion.
The Importer is an assistant that outputs a completely new VMware virtual machine based on the input virtual machine.