Open access scholarly communication of Poland can be searched via the "CeON Aggregator" of the University of Warsaw Interdisciplinary Centre for Mathematical and Computational Modelling's Centre for Open Science.
As of March 2018, the UK-based Directory of Open Access Repositories lists some 91 repositories in Poland. However, according to the OpenAIRE project, "the majority of these are digital libraries, providing access to the digitized content of library collections, not functioning as repositories open to authors for the deposition of their own work." University of Lodz Repository and Adam Mickiewicz University Repository maintain the largest number of digital assets. The Warsaw Public Library runs the Mazowiecka Biblioteka Cyfrowadigital library, established in 2011.