This paper aims to survey the new methodology and tools for user-defined applications development, based on Service-Oriented Computing (SOC) and Model-Driven Approach (MDA), when all computing units, both hardware and software, can be treated as services and domain ontology acts as a meta-model basis to generate a conceptual model for specific information systems. It allows programmers to create new applications using ready-made service available on the network, from one side, and an application itself may create (compose) the infrastructure it needs to run, from other.