• DOAJ
• Index Copernicus (ICV for 2013: 6.62)
• Google Scholar
• Google Search
• HINARI (WHO, Geneva)
• Genamics
• Open Science Directory
• AGORA
• BOAI
• Index Scholar
• Journal Index
• eJManager
• Scirus (Elsevier)
• SOROS
• BASE Search Engine
• Find ejournal
• NEWJOUR
• Open J-Gate
• ICMJE
• WorldCat
• AcademicKeys
• Docstoc
• CiteFactor
• ResearchBib
• getCITED
• Ulrich’s international directory
• University of the West Library
• Other databases.