1. Bioline International
  2. Cambridge University Press
  3. Cochrane Library
  4. DOAJ (Directory of Open Access Journal)
  5. EBSCO Free Databases 
  6. Electronic Library of Mathematics
  7. Electronic Journals of the University of Malaya (ejournal)
  8. Free Medical Journals
  9. Frontiers Journals
  10. Harvard Dataverse
  11. International Journals of Multidisciplinary Research Academy
  12. JSTOR and Artstor
  13. Karger’s Open Access Journals
  14. MyCite
  15. MyJurnal – Malaysian Journals
  16. OALib Journal 
  17. PubMed
  18. Research Gate
  19. RePEc Research Papers in Economics
  20. Sociology and Criminology
  21. Science Direct Open Access Journals
  22. Springer Open