recently released, is a cross-platform virtualization application that installs on your Intel or AMD-based computers, and runs on Windows, Mac, Linux or Solaris operating systems. It extends the capabilities of your computer so that it can run multiple operating systems (inside multiple virtual machines) at the same time.
Read the complete story.
Install by running the following commands via your systems Terminal.
sudo sh -c 'echo "deb http://download.virtualbox.org/virtualbox/debian trusty contrib" >> /etc/apt/sources.list'
wget http://download.virtualbox.org/virtualbox/debian/oracle_vbox.asc -O- | sudo apt-key add -
sudo apt-get update
sudo apt-get install virtualbox-4.3