To build MBE workbenches, designers must be autonomous in creating and maintaining their own viewpoints, without coding. Developers can enrich them afterward, for instance for algorithm implementation. To meet this requirement, Eclipse Kitalpha™ offers a development environment made of DSLs (Domain-Specific Languages) to assist designers and developers in their architecture frameworks and viewpoints development activity activities. For instance, textual editors make it possible to declare viewpoint metamodels, user interfaces, diagrams, or services. From those DSLs, generators build all the architecture framework and viewpoint artifacts. For example, the declaration of diagrams using DSLs becomes the technical description of Sirius diagrams. During the stages of edition with DSLs and generation, the notion of target application is introduced to manage the variability of environments in which the artifacts are to be deployed and executed (e.g., DSL vs. UML, CDO vs. XMI environments).