In this chapter, the authors' concentrate on recent trends in humanities research infrastructures. They observe the common practices that have emerged in various large-scale transnationally operating infrastructure projects. Humanities research infrastructures have been theorized as digital ecosystems without a centre and constituted through heavily interconnected online platforms. Following the idea of ecosystems, crowds stand next to clouds as equal components of an infrastructure. The authors' focus on research infrastructures rather than on library and archive integration projects such as Europeana, because research infrastructures share the overall final aim to action research. Europeana, on the other hand, primarily aims to fulfil the needs of a culturally interested public rather than the needs of a specific research community. CLARIN has managed to bring together many parts of the European community that work with language resources. CLARIN's key paper has mainly been cited by the language resources community according to Google Scholar.