The document discusses various approaches to application development on OpenStack including doing it yourself with open source tools (DIY), using configuration management tools to gather automation tools into a management layer (Mantl), and adopting standards and components through Platform as a Service tools (Cloud Foundry). It provides examples of tools for infrastructure as code (Heat), container orchestration (Docker), and describes the basic flow of application deployment on Cloud Foundry including using its open source software plus commercial modules. The goal is to help development teams focus on application delivery rather than underlying OpenStack configuration and management.