Federal Government and Organizations

• COVID-19 Open Research Dataset (CORD-19), "a free resource of over 45,000 scholarly articles, including over 33,000 with full text, about COVID-19 and the coronavirus family of viruses for use by the global research community." Search the dataset using CORD-19 Explorer. The content is from PubMed Central, the World Health Organization, bioRxiv, and medRxiv. The resource is sponsored by the Allen Institute for AI and partners.
• NIH's COVID-19 Topic Page is a portal to COVID-19 research, news, visualizations, and funding opportunities.

Publishers

• Elsevier Novel Coronavirus Information Center is the portal to all COVID-19 research articles published by Elsevier, including clinical information and drug discovery.
• The Lancet has opened access to all COVID-19 preprints.
• The New England Journal of Medicine is offering all journal content related to COVID-19.
• ProQuest Coronavirus Research Database lets you explore full text publications from ProQuest, open access publishers, and pre-publication repositories, e.g., arXiv.org. Search for "university of north texas" to get started. 
• Sage Journals has opened access to all COVID-19 research articles in their collection, including the disciplines of medicine, public health, and social sciences.
• Springer Nature is providing free access to their journals, commentary, and books related to COVID-19.