DreamFactory is a free open source REST API platform that runs in the cloud or on premises. Single-click installers are available for most of the Infrastructure as a Service (IaaS) and Platform as a Service (PaaS) cloud vendors. You can also run DreamFactory on a Linux, Windows, or Mac desktop computer. The software package includes a complete LAMP Stack with PHP and a dedicated SQL database that can be installed on any server. A free hosted developer sandbox environment is also available.