DIY Private Cloud ... using VirtualBox and Chef
vagrant snapshots with rollback support
VeeWee: the tool to easily build vagrant base boxes or kvm,virtualbox and fusion images
Running OS X on VirtualBox
Vagrant is a tool for building and distributing virtualized development environments.By providing automated creation and provisioning of virtual machines using Oracle’s VirtualBox, Vagrant provides the tools to create and configure lightweight, reproducible, and portable virtual environments.