Application generators translate specifications into products (programs, documentations. An application generator builder offers a way to define specification languages and associated parsers, to describe and traverse the meta-models structure and to specify the derivation on this structure. STEP is an ISO 10303 standard developed to facilitate product information sharing by specifying sufficient semantic content for data and their usage. STEP technology offers very useful software tools and can be applied for the design and the implementation of application generators. EUGENE is a STEP-based framework, that is intended for the building of application generators. After a concise presentation of EUGENE, this paper presents different application generators built with this framework within an industrial project. Then, different properties of generators are examined to establish the kind of generators which can be successfully built with EUGENE. Finally, we conclude with the main benefits of our approach.