OpenStack is a cloud operating system that controls large pools of compute, storage, and networking resources throughout a datacenter, all managed through a dashboard that gives administrators control while empowering their users to provision resources through a web interface.
OpenStack is invented by Rackspace and NASA. Sounds cool, right?
Others companies like HP, IMB, Red Hat and Dell are using OpenStack for serving cloud computing. Ubuntu, for example, offers Ubuntu OpenStack for build custom cloud ready to go.
OpenStack can manage compute, storage and networking from a simple dashboard. Check out the following image. Also, we can config and manage all the resources throw the complete API. Feel free to get SDKs libraries and test yourself.
Check out the dashboard working on this video demo:
You can download and run OpenStack for free, install it on your own datacenter (for public or private clouds), and build the next IaaS.