- Hinari
- Ulrich’s International Periodical Directory
- Sjournals
- ResearchBib
- Hardin Library
- AsiaJOL
- Journal seek
- Directory of Open Access Journals (DOAJ)
- International Committee of Medical Journal Editors ( ICJME)
- Academic Keys
- Nepjol
- JournalTOCs
- Citefactor
- E-journals
- University of Saskatchewan Library
- Journals4free
- Beardslee Library
- Evans Library
- Florida Institute of Technology
- LIBRIS
- National Library of Sweden
- Universite de Bordeaux
- Universiteits Biblio Theek Gent
- Free MedicalJournals
- PubsHub
- InfoBase
- Directory of Research Journals Indexing (DRJI)
- Harvard Library Bibliographic Dataset
- Worldcat
- Cabell's Directory
- Kenpro
- J Gate
- Geneva Foundation for Medical Education and research
- ROAD Directory of Open Access Scholarly Resources
- SHERPA/RoMEO,
- Bielefeld Academic Search Engine (BASE)
- Medical Journals Links
- Scientific Indexing Service
- Open Academic Journal Index
- Googlescholar
- SIS Database
- Indianscience journals
- China National Knowledge Infrastructure (CNKI)