Viapps
opensource Virtual Appliance Factory
...Solution allows to create, install, config, update, admin, monitor and audit services like Firewalls, DNS/DHCP/NTP Servers, HTTP Proxy, SMTP Gateways and IP LoadBalance (more services are comming).
It is based on opensource components like Chef Server and own development, is compatible with main Cloud infrastructure technologies like VMWARE, Openstack, Cloudstack and openNebula .
Extensible, it is posible to easily add new functionality and integrate with other platforms with a powerfull RESTful API