VMWare Workstation has always been a pretty good desktop virtualization product. I first used VMware Workstation 3 back in 2004. Back then I used it for testing recovery scenarios.
The latest Workstation offering from VMWare shows why this product has managed to be so strong in the past. The key features in this version are:

So you have been working with VMWare Server for a while and you convinced your boss to install a VMWare ESX server. How can you move your development servers to the new ESX server?
If you wanted to pay for the VMWare Converter enterprise version it could do it for you. Another way is to copy [...]

Another desktop virtualization tool is Sun VirtualBox. Virtualbox operates in a similar way to other desktop virtualization tools. It allows you to create virtual machines within a host operating system like Windows XP etc.
So how does VirtualBox compare? VirtualBox has similar features to other products:

Supports software and hardware virtualization
Supports most guest operating systems
32bit and 64bit [...]

The latest iteration of VMware™ Workstation has been released. This version has introduced some new features including Unity and virtual machine streaming.
Unity is a feature that allows a window to be popped out of the virtual machine and made seamless. VMware™ is not the first to add this functionality but it is still a good feature [...]