• General/Interdisciplinary
• Economics
• Education
• History
• Newspapers
• Sciences and Mathematics
• * Denotes that there are no translations for the articles in this collection

General/Interdisciplinary

• Australian Periodical Publications 
• Boston College Publications
• CiNii: Open Access Journals 
• Council for the Development of Social Science Research in Africa Department of Digital Library of the Commons
• Directory of Open Access Journals
• Free IngentaConnect backfiles
• Gallica
• Home Economics Journals 
• Journal @rchive
• Marquette Journals
• US National Archives
• Open J-Gate
• Partnership For Peace Consortium: Connections Online Publications
• PERSEE - Portail de revues scientifiques en sciences humaines et socials   *
• Publications and Dissemination
• Retrodigitized Journals (Architecture)
• Revues.org (French, sort of like Persee)  *
• Sistema de Bibliotecas de la UNMSM
• U.S. Government Documents
• UNICEF
• Universidad Complutense de Madrid Free Journals   *
• Universidad Oberta de Catalunya
• Wiley Open Access

Economics

• AgEcon: Research in Agricultural & Applied Economics  
• Federal Reserve Bank of Cleveland Economic Research & Data
• Federal Reserve Bank of Dallas Economic Research Publications
• Federal Reserve Bank of New York Research Publications
• Federal Reserve Bank of Philadelphia Publications
• Federal Reserve Bank of Richmond Research Publications
• Federal Reserve Bank of St. Louis Economic Research Publications
• FRASER Publications

Education

• The Education Research Global Observatory
• Symposium Journals Free Content

History

• ADAJE: American Digital Archive of the Jewish Experience 
• American Memory 
• British History Online 
• Compact Memory (German Jewish journals)   *
• Digital Innovation South Africa
• Internet Library of Early Journals 
• Making of America Journals (Cornell) 
• Making of America Journals (Michigan) 
• Nineteenth-Century Serials Edition
• Wissenschaftliche Rezensionsorgane  *

Newspapers

• Austrian Newspapers Online  *
• Chronicling America: Historic American Newspapers
• National Library of Australia Historic Austrialian Newspapers, 1803-1954
• Papers Past
• Periodici Italiani Digitalizzati *

Sciences and Mathematics

• Bioline International
• BioMed Central 
• BioOne Open Access Titles
• Cell Press Free Archives
• Core Historical Literature of Agriculture: Cornell University
• DigiZeitschriften Open Access Journals  *
• Florida Marine Research Publications
• HighWire Press
• Hindawi Publishing Open Access Journals
• Inter-Research
• J-STAGE Freely Available Titles
• KoreaScience Open Access Journals
• mBio
• Missouri Botanical Garden Botanicus Collection
• NUMDAM
• Project Euclid Open Access
• Psychonomic Society Publications Archive
• Public Library of Science (PLoS)
• PubMed Central
• REDALyC (Latin America and Caribbean)
• SciELO Argentina  *
• SciELO Brazil *
• SciELO Chili  *
• SciELO Colombia  *
• SciELO Costa Rica  *
• SciELO Cuba  *
• SciELO Mexico  *
• SciELO Peru  *
• SciELO Portugal  *
• SciELO Public Health  *
• SciELO Spain  *
• SORA - Searchable Ornithological Research Archive
• SpringerOpen