- AULIMP (Index to Military Periodicals)
- BASE: Bielefeld Academic search engine
- Bulb Information services
- Citebase Search ( Citation Database)
- Citebase Search ( Citation database) Physics,Math
- CiteSeerX (Citation database)
- CiteSeerX (Citation database) Math
- CiteULike (Citation Database)
- Cogprints
- DMOZ:Open directory project
- eigenFactor.org (Impact factor Science/Social Science)
- E-print Network (Science and Technology)
- GENESIS (Women's History)
- HubMed (Alternative interface to PubMed)
- Indian Academy of Science
- Infomine
- Intute (Multidisciplinary)
- Mathguide (Mathematics)
- Mendeley (Multidisciplinary)
- NewJour
- Pinakes
- Sociosite
- SocioSite (Social Science)
- The Electronic Library of Mathematics
- The world fact book
- University World News
- Voice of the shuttle
- Wikipedia (The Encyclopedia)
- www virtual Library
