The U.S. National Institutes of Health's free full-text archive of biomedical and life sciences literature.

The World Health Organization's official digital library. Essential for policy, guidelines, and technical documents.

Provides access to health literature from low and middle-income countries, managed by the WHO.

Access high-quality systematic reviews for emergency medicine, trauma, and critical care (see Emergency & Injuries groups).

The UN's primary hub for humanitarian situation reports, crisis analyses, and operational evaluations.

The OCHA's open platform for finding and sharing datasets about humanitarian crises and disasters.

The U.S. DoD's repository for defense-funded research, including operational and military medicine.

NASA's official public access repository for all NASA-funded research, including articles and data.

The primary open-access pre-print server for physics, astrophysics, and space science research.

The European Space Agency's official hub for publications, reports, and mission data.

A leading open-access repository for pre-prints and early-stage research in social sciences, leadership, and finance.

The key repository for research in AI, machine learning, human-computer interaction, and technology systems.

A major open-access, peer-reviewed journal for futures studies, foresight, and strategic planning.

A global public database from the UN's FAO with millions of records on food, agriculture, and related sciences.

Global development data, including key indicators on climate change, agriculture, environment, and poverty.

The world's largest provider of Earth observation (satellite) data for monitoring environment and climate.

Access to journals and books in food, agriculture, and environmental science for low-income countries.

A cross-disciplinary index of high-quality, peer-reviewed open access journals from around the world.