Scopus (coverage from 2014)
DOAJ
Chemical Abstracts Service
FSTA (Food Science and Technology Abstracts)
EBSCO
Index Copernicus
Islamic World Science Citation Center (ISC)
Barakatkns
Electronic Journals Library
Academic Keys
WorldCat
OAJI
SIS
Directory of Science
Google Scholar Citation
ULRICHSWEB 
Medical Journals Links 
NLM Catalog
Root Indexing
Eurasian Scientific Journal Index
CABI
EuroPub
Civilica
Magiran
ICMJE