arXiv is an e-print service in the fields of physics, mathematics, computer science, quantitative biology, quantitative finance, statistics, electrical engineering and systems science, and economics. It provides access to more the 1.3 million e-prints. The Max Planck Society is a member institution of arXiv.

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).

Cogitatio is an academic and community-oriented publisher based in Lisbon, which was founded in 2014 with the aim of promoting the open access dissemination of scientific knowledge. Cogitatio currently publishes 4 peer-reviewed Open Access journals focusing on research in the social sciences and humanities. From January 1, 2023, the Max Planck Society covers article-processing charges for Max Planck authors centrally. Further details are available on the MPDL website.

GENESIS-Online ist die Haupt-Datenbank des Statistischen Bundesamtes. Sie enthält ein breites Themenspektrum fachlich tief gegliederter Ergebnisse der amtlichen Statistik. Der Tabellenabruf ist kostenfrei Datenangebot Gebiete, Bevölkerung, Erwerbstätigkeit, Wahlen / Bildung, Sozialleistungen, Gesundheit, Recht /Wohnen, Umwelt /Wirtschaftsbereiche / Außenhandel, Unternehmen, Handwerk / Preise, Verdienste, Einkommen und Verbrauch / Öffentliche Finanzen / Gesamtrechnungen.

Zenodo is an open data repository, developed and operated by CERN. It is an catch-all repository, that welcomes research from all over the world, and from every discipline. Zenodo does not impose any requirements on format, size, access restrictions or licence. A digital object identifier (DOI) is automatically assigned to all Zenodo files and it is integrated into reporting for research funded by the European Commission.