With more than 700.000 items, the BBF is today Europe's second largest library specialised in education. Like the Herzog-August-Bibliothek in Wolfenbüttel, it belongs to the association of German cultural research libraries fulfilling a national role.

BioMed Central is an STM (Science, Technology and Medicine) publisher of 270 peer-reviewed open access journals. The portfolio of journals spans all areas of biology, biomedicine and medicine and includes broad interest titles, such as BMC Biology and BMC Medicine alongside specialist journals, such as Retrovirology and BMC Genomics. The Max Planck Society is a BMC member and covers article-processing charges for Max Planck authors centrally. Further details are available on the MPDL website.

Cairn offers the most comprehensive collection of French and Belgian journals in social sciences available online. Note that access to newer content is generally not free of charge (moving wall 2 to 5 years).

The Digital Library of the Commons (DLC) is a gateway to the international literature on the commons. The DLC provides free and open access to full-text articles, papers, and dissertations. This site contains an author-submission portal; an Image Database; the Comprehensive Bibliography of the Commons; a Keyword Thesaurus, and links to relevant reference sources on the study of the commons.

Frontiers is a community-oriented open-access academic publisher and research network. It was launched in 2007 by scientists from the Swiss Federal Institute of Technology in Lausanne and aims to provide better tools and services to researchers in the Internet age. Since then, Frontiers has become one of the fastest-growing open-access scholarly publishers: over 400,000 high-quality, peer-reviewed articles have been published in about 200 community-driven journals across more than 300 specialty niches in science, medicine and technology. The Max Planck Society covers article-processing charges for Max Planck authors centrally. Further details are available on the MPDL website.

LIVIVO bundles scientifically relevant resources from the subjects fields medicine, health, nutrition, environmental and agricultural sciences. It provides a common search interface over various data sources, such as library catalogs, specialist bibliographic databases, full texts from journals, and quality-controlled web content. LIVIVO combines the former ZB MED search portals MEDPILOT (2003 to 2015) and GREENPILOT (2009 to 2015).

Im Rahmen der digitalen Monumenta Gremaniae Historica (dMGH) wurden in einem von der DFG geförderten Gemeinschaftsprojekt zwischen den MGH und der Bayerischen Staatsbibliothek, München, sämtliche Editionsbände der MGH digitalisiert und Open Access zur Verfügung gestellt. Neue Bände werden nach einer Schutzfrist von drei Jahren in die dMGH aufgenommen („moving wall“). Bis Ende 2010 war die Volltexterfassung der älteren Bände abgeschlossen. Eine Volltextsuche ist über die Abteilungen möglich: - Scriptores (Geschichtsschreiber) - Leges (Rechtstexte) - Diplomata (Urkunden) - Epistolae (Briefe) - Antiquitates (Dichtung und Gedenküberlieferung) - Quellen zur Geistesgeschichte des Mittelalters (QQ zur Geistesgesch.) - Deutsches Mittelalter. Kritische Studientexte (Dt. MA)