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