IaaS

OpenStack Clouds

OpenStack is an open-sourced, IaaS cloud computing platform founded by Rackspace Hosting and NASA, and used widely in industry. Some of the modules that it provides to users includess compute, storage and network components allowing users to get easily stated in cloud computing.

Many clouds exist that have OpenStack as a foundation as part of the cloudservices offered to users. Some of them are free, some are commercial services.