Openstack

Just install Openstack/Dashboard for demos. Different modes, single machine mode tested.

No Chef, Nagios whatever.

Openstack automatic install

http://networkstatic.net/openstack-folsom-quantum-devstack-installation-tutorial/

Openstack install using rackspace ISO

Crowbar not tested.

Crowbar install

Crowbar install ISO

Install Windows with virtIO support

Using Nova CLI

Openstack documentation

Detailed Openstack install