ClearOS Community is a cloud-connected Server, Network, and Gateway operating system designed for small and medium-sized organizations. You can think of it as a next generation small business server that you can install on hardware, in a virtual machine, or in the cloud. ClearOS comes with a Marketplace full of easy to install apps and the solution is a snap to configure thanks to the intuitive web-based interface.
http://www.clearfoundation.com/Software/overview.html
Live Demo:
http://www.clearfoundation.com/Software/live-demo.html