JSTOR is one of the largest and most reputable journal archives in the world. The content set currently available to the Wikipedia editors includes many of JSTOR's archival journal collections and the 19th Century British Pamphlets collection.

SpringerLink includes over 26,000 ebooks and 2000 scholarly journals in the sciences, business and economics, engineering, humanities, social sciences, law, and mathematics.

ProQuest is a multidisciplinary research provider. This access includes ProQuest Central, which includes a large collection of journals and newspapers, Literature Online, the HNP Chinese Newspaper Collections, and the Historical New York Times.

SAGE Journals SAGE is an American independent publisher with more than 1,000 journals, from a wide range of disciplines.

British Online Archives offers access to a unique collection of primary source documents in humanities and social sciences.

Nature is an international weekly scientific journal.

NewspaperARCHIVE.com is an online database of digitized newspapers, with over 2 billion news articles; coverage extends from 1607 to the present from US, Canada, the UK, and 20 other countries.

Ancestry.com comprises a collection of genealogical, historical, and genetic records. This partnership gives access to the World Explorer membership, which includes all US and international records.

The Journal of the American Medical Association is a peer-reviewed medical journal published 48 times a year by the American Medical Association. It publishes original research, reviews, and editorials covering all aspects of biomedicine.

L'Informé is a French economic investigation website, covering a wide range of topics regarding the country: the economy, defence, energy, consumer affairs, medias, luxury goods, etc.

Newspapers.com includes more than 800 million pages from 20,000+ newspapers. The collection includes some major newspapers for limited periods (e.g., 50 years of the New York Times), but mostly consists of US regional papers from the 1700s to the late 1980s. Free accounts through the Wikipedia Library include access to Newspapers.com Publisher Extra content.

BMJ (originally the British Medical Journal) is a peer-reviewed medical journal.

Perlego is a digital online library focusing on the delivery of academic, professional and non-fiction eBooks.

Wiley offers collections of online journals, books, and research resources, covering life, health, social, and physical sciences.