A fundamental basis of a successfully operating digital infrastructure such as DARIAH is formed by the services it provides to its users. In the particular case of the distributed setup DARIAH is using, the integration of new services requires support and guidelines that can be agreed to by all current and future service providers. Such generic guidelines can support individual research as well as new research projects just starting out, and – ideally – later enable the infrastructure to sustain their products. By the development of three demonstrators (i.e. prototypical services) within WP4 the partners deliver an implementation of the above-mentioned guidelines and principles. The demonstrators delivered within WP4 rely on a common topic: bibliographical metadata. The demonstrators show the usage of tools for bibliographical metadata in various stages of the research process, e.g. extraction of entities, the collection and sorting of citations, visualisation of selected aspects of the data. They have been developed with the involvement of the community, applying already existing experiences and resources, and finally are open to be re-used beyond the project.