Cloudfoundry is an open source Platform as a Service (PaaS) that provides a variety of services for developing, deploying, and scaling applications. It uses a microservices architecture and containers to deploy applications. Developers can push applications to Cloudfoundry which will then store the application bits, track metadata, and direct a Droplet Execution Agent node to stage and run the application. Cloudfoundry also provides a marketplace of services that applications can use like databases through service instances. It implements role-based access control with organizations, spaces, and roles to control access and permissions.