Oracle VM VirtualBox is used by the whole gamut of IT Professionals, from those near to the customers (such as the Sales, Consultants and SE guys), to those near to the lines of code (such as developers, test and QA), and all stops in between (Support, Architects, etc).
This week I stumbled over a pretty good list of reasons why VirtualBox appeals to one community of IT Pros, namely Programmers. (aka Software Engineers, Developers, you know who you are). If this is you, you may be interested in one guy's view on why developing in a virtualized environment
works for him.