In an increasingly connected world where all manner of devices can communicate over the Internet, conventional methods for developing GUIs (Graphical User Interfaces) are insufficient. For systems of such devices, it must be possible to develop the system itself independently from its GUI(s). In this paper, we present an approach for developing GUIs towards already deployed, or “live”, service-based distributed systems without the need to write any additional program code (“glue code”). The results include development tools, and an implementation for the middleware framework PalCom and the mobile platform Android; they have been tested in several research projects and have been used for developing commercial products.