Pervasive applications raise major challenges in term of software engineering and remain hard to develop, deploy, execute and maintain. Context-awareness, in particular, is a salient and difficult property that must be met by pervasive applications. We have developed a service-based approach facilitating the design and execution of a context module on top of iPOJO/iCasa, our pervasive platform. This demo will illustrate our approach on diverse applications developed with the Orange Labs in the health domain.