Electronic Library of Mathematics (by European Mathematical Society and Zentralblatt Math and includes journals, monographs and lecture notes)
DIGI Zeitschriften (Completely or partial on-line available magazines)
Seals (Swiss Electronic Academic Library Services) Portals
(Provides free online access to archives of Commentarii Mathematici Helvetici and LENSEIGNEMENT MATHATIQUE )
Goettinger digitization center GDZ (Provides free online access to monographs, articles, etc in Mathematics)
Numdam Website (The NUMDAM program is supported by the French Ministry of Higher Education and Research by CNRS. It attempts to retro-digitize the ancient mathematics documents published in France).
The NASA Astrophysics Data System (The Digital Library for Physics, Astrophysics and Instrumentation Developed by NASA)
High Wire Press (Stanford University)
CERN Document Server (Over 800,000 bibliographic records, including 360,000 full text documents of interest to people working in particle physics and related areas. Covers preprints, articles, books, journals, photographs and much more).
SPIRES - HEP Literature Database (Search more than 500,000 high-energy physics related articles, including journal papers, preprints, e-prints, technical reports, conference papers and theses, comprehensively indexed by the SLAC and DESY libraries since 1974.)
Indian Academy of Sciences Publications
Gallica - National Library of France (Please select Recherche and then Periodique from this web site to see the list of journals including Royal Society of London's Journals available).
Scirus - a science specific search engine
Open J-Gate (Open J-Gate is an electronic gateway to global journal literature in the open access domain.)