• BASE - Bielefeld Academic Search Engine A search engine especially for academic open access web resources, BASE provides more than 70 million documents from more than 3,000 sources, including the full text of about 70% of the indexed documents.
• DART-Europe E-theses Portal Discovery service for full text, open access research theses awarded by European Universities.

• Eldis Research and policy documents relating to international development.
• EThOS (e-theses online service) Search over 400,000 doctoral theses from over 120 institutions. Users must register before use. Around 160,000 are available in full text, and of the remaining 240,000 records dating back to at least 1800, three quarters are available to be ordered for paid scanning.
• Gov.uk UK Government publications.
• Grey Matters: a practical tool for searching health-related grey literature The Canadian Agency for Drugs and Technologies in Health (CADTH) Research Information Services' grey literature checklist.
• HMIC - Health Management Information Centre Covers journal articles, official publications, books, reports and pamphlets relevant to health management and policy.
• King’s Fund Library The King’s Fund Database is a source of information on health and social care policy and management including material described as grey literature – research reports produced by trusts, charities and government agencies that are not published in journals. Search the database by keyword or consult the public lists of material on specific topics. The database is updated daily and the lists when new and relevant information pertaining to each topic is released.
• OAIster Cross searches all university repositories worldwide.
• Open access theses and dissertations Over 3.5 million electronic theses and dissertations that are freely available online.
• Open DOAR An authoritative directory of academic open access repositories.
• OpenMD A search engine for health information. Includes documents from government agencies, global health organizations, medical journals, and reference sites.
• Overton On access users can follow the link and Browse the site or create an account and Login to to save searches, set email alerts, tags and bookmarks and set up key sources lists. Overton is the world’s largest collection of policy documents, parliamentary transcripts, government guidance and think tank research.
• Policy Commons Access to more than 24 million pages of curated, high quality policy reports, briefs, analyses, working papers, and datasets from thousands of policy organisations including IGOs, NGOs and think tanks. Please view this short video introducing the platform and features.
• ProQuest Dissertations and Theses Global Includes millions of searchable citations to dissertation and theses from around the world from 1861 to the present day together with over a million full text dissertations that are available for download in PDF. The database offers full text for most of the dissertations added since 1997 and strong retrospective full text coverage for older graduate works.
• PsycEXTRA Technical and government reports, conference papers, newsletters, magazines, videos, press releases, and consumer brochures in the field of psychology, behavioural sciences and health.
• Scottish Government Scottish Government publications, reports and more.
• Social Care Online Legislation, government documents, practice and guidance, systematic reviews, research briefings, reports and journal articles relating to social work and social care.
• Social Science Research Network Abstracts, working papers and articles relating to social science research.
• TRIP medical database A search engine that finds clinical guidelines, synopses of evidence, systematic reviews, journal articles, clinical trials, medical images and videos, patient information, etc.
• UCL Discovery UCL's open access repository of research papers and theses written by UCL authors.