Project MUSE is a leading provider of digital humanities and social science content for the scholarly community. Since 1995 the MUSE journal collections cover full-text versions of scholarly journals from many of the world's leading university presses and scholarly societies, with over 120 publishers currently participating.

The Routledge Encyclopedia of Philosophy Online (REP) is a resource for the study of philosophy. It provides access to over 2,800 articles that have been edited for level and consistency by a team of renowned subject experts. Regularly updated with new and revised articles it is an entry point for further discovery and research, clearly organised and with over 25,000 cross-references linking themes, concepts and philosophers. It is also a reference source for those in subjects related to philosphy, such as politics, psychology, economics, anthropology, religion and literature.

The SpringerLink platform provides MPG staff with access to a huge collection of English and German eBooks from 2005 onwards, as well as the English and the German collection of the Springer Book Archive (1842-2004). In addition, the content of selected book series is available. Includes major reference works and dictionaries. Max Planck researchers who publish a monograph or edited volume with Springer Nature as an Open Access eBook receive a discount on the standard Book Publishing Charge. MPDL covers the costs remaining on a pro rata basis. Further details are available on the MPDL website.