Advanced science index
Ae global index
Albert (all library books, jornal and electronic records telegrafenberg)
Cas source index (cassi) 
Cosmos impact factor
Daij directory of abstract indexing for journals
Directory of journal quality factor
Directory of research journal indexing drji
Electronic journals library
Eurasian scientific indexed journals
Gateway bayern, bavarian library network
Genamics journal seek
General impact factor
Geomar library ocean research information access
German e-journals library (ezb)
German national serials database-zdb
Giga | german institute of global and area studies
Global impact factor
Google Scholar
Impact factor services for international journals)
Index Copernicus 
Index of Turkish education
Infobase journal index
International accreditation and research council
International directory of food, agriculture and environment
International impact factor services
International innovative journal impact factor
International Institute for research impact factor journals
International research journal impact factor
International scientific indexing
International services for impact factor and indexing
International society for research activity
International society of indexing
International society of universal research in sciences
International technical research development association
Internet achieve
Io2r international institute for organised research
Isra – jif indexing services
Issn national centre & national science library
Issuu journal listings
Journal iseek
Journals impact factor
Max perutz electronic journals library
Miar, information matrix for analysis of journals
OCLC WorldCat journal library
Opac plus – Bavarian state library
Open academic journal index
Open access library
Open j-gate
Pbn polish journal bibliography
Primus portal kobv
Research bible
Research impact factor
Road directory for open access resources
Root Society for indexing and impact factor service
Scholar impact factor (saif)
Scholarsteer sc
Science impact factor
Science impact factor
Science library index
Scientific indexing services
Scientific world index
Scientific journal impact factor
Smithsonian libraries
Society of economics and development
Sparc institute of technical research indexing service
Tib German national library of science and technology (tib) ‒ Leibniz information centre for science and technology
Ulrich web global serial directory
Universal impact factor
Vufind, library and information service (lis)
World catalogue for scientific journals
Wzb berlin social science centre, Germany
Zb med, Leibniz information centre for life sciences, Germany