Cloud Foundry is an open-source PaaS (Platform-as-a-Service) originally developed by VMware. Written primarily in Ruby and Go, Cloud Foundry sports an open architecture that includes an application services interface, a cloud provider interface, and a buildpack mechanism for adding frameworks. Buildpacks for Java, Node.js, Ruby, and Go frameworks are part of the core system; GitHub provides a list of Community buildpacks for other frameworks, such as those for .NET- and PHP. Cloud Foundry comes with a self-service application execution engine; an automation engine to deploy applications and manage their lifecycles; and tools for authentication and identity management, among others. Cloud Foundry has an active developer community and powerful sponsorship from leading vendors, including platinum sponsors VMware, EMC, Rackspace, IBM, and Pivotal.