Indexing & Abstracting Services

• OpenAIRE
• ScienceGate
• ResearchGate
• Semantic Scholar
• Scope Database
• China Academic Journals (CNKI)
• Academic Resource Index
• Directory of Open Access Scholarly Resources (ROAD)
• Directory of Research Journals Indexing

Journal Ranking Lists

• American Quality Centre for Journals

Digital Preservation

• LOCKSS
• CLOCKSS
• PKP Open Archives Harvester 

Content Aggregators

• Scilit
• WorldCat
• Google Scholar

Journal Directories

• SHERPA/RoMEO

Other Directories

• ADVANCED SCIENCE INDEX
• ICI Journals Index Copernicus (Poland)
• Harvard Library
• JournalTOCs
• International Scientific Indexing (ISI)
• EuroPub
• International Institute of Organized Research
• Scientific Indexing Services
• ESJI
• Zenodo
• Root Indexing
• Slides Share
• CiteFactor
• Academia.edu

Other Libraries: