1. Index Medicus (IMSEAR)
  2. Global Index Medicus
  3. Index Copernicus
  4. Thomson Reuters (ResearcherID), U.S.A
  5. International Scientific Indexing (ISI)
  6. Google Scholar
  7. International Committee of Medical Journal Editors(ICJME)
  8. Research Bible
  9. Scientific Indexing Services(SIS)
  11. Scientific Journal Impact Factor (SJIF)
  12. Advanced Science Index
  14. Gaudeamus
  15. Academic Keys
  16. Sribd
  17. Universal Impact Factor
  18. Impact Factor Services for International Journals (IFSIJ)
  19. International Institute of Organized Research (I2OR)
  20. PubsHub
  21. Scholar Article Impact Factor (SAIF)
  22. Eurasian Scientific Journal Index (ESJI)
  23. J-Gate
  24. Open Academic Journals Index(OAJI)
  25. CiteFactor
  26. Directory of abstract indexing for Journals(DAIJ)
  27. IIFS(International Impact Factor Services)
  28. Jour Informatics
  29. Sherpa Romeo
  30. Scholarly Open Access
  31. Ulrichs Web Global Serial Directory
  32. Cosmos
  34. Directory of Research Journal Indexing (DRJI)
  35. III Factor
  36. International Journal Impact Factor(IJIF)
  37. Science Library Index
  38. Scientific World Index
  39. International Innovative Journal Impact Factor (IIJIF)
  40. Scholarsteer
  41. General Impact factor
  42. Global Impact Factor
  43. Journal Quality Factor
  44. ROAD
  45. DocFoc
  46. Open Access Library
  47. Indian Journals Index
  48. Electronic Journals Library
  49. World Cat
  50. Budapest Open Access Initiative
  51. Research Impact factor
  52. DIIF
  53. JIFactor
  54. Research Junction
  55. Root Indexing
  56. Journal Factor
  57. Geneva foundation for medical education and research
Global Index Medicus Index Copernicus ResearcherID Google Scholar SAIF SJIF ISI client 2 Gaudeamus ISI ijcme client 2 client 2 client 3 client 5 client 2 client 2 client 4 IFSIJ IFSIJ ESJI J-Gate Oaji CiteFactor DAIJ IIFS JOUR Sherpa SOA Ulrich Cosmos POLSKA BIBLIOGRAFIA NAULOVA Directory of Research Journal Indexing (DRJI) III Factor International Journal Impact Factor(IJIF) Science Library Index Scientific World Index International Innovative Journal Impact Factor (IIJIF Scholarsteer General Impact factor Global Impact Factor Journal Quality Factor ROAD DocFoc Open Access Library Indian journals Index Electronic World Cat BOAI RIF DIIF JIF Research Junction  Root Indexing  Journal Factor  Geneva foundation for medical education and research