This plugin integrates Jenkins with the VirtualBox 4.x virtual machine.

This is a clone of the virtualbox 3.x plugin
git://github.com/jenkinsci/virtualbox-plugin.git

... and fixes JENKINS-8634
"VirtualBox 4.0.2 web-server became incompatible with virtualbox plugin 0.2.1"
http://issues.jenkins-ci.org/browse/JENKINS-8634