Open Access e-resources

African Journals Online (AJOL)
 Provides access to African-published research papers and journals  and increases worldwide knowledge of indigenous scholarship.

Betham Open
Publishes a number of peer-reviewed, open access journals on all major disciplines of science, medicine, technology and social sciences.

Bioline International
Provides open access to quality research journals on health related matters published in developing countries.

 Book Boon
Contains free downloadable e-books and textbooks on a variety of subjects such as accounting, economics, finance, engineering, IT, programming, languages, marketing, law, statistics, mathematics, natural sciences and management.

Directory of Open Access Books (DOAB) Increases discoverability of Open Access books.

Econpapers Provides access to a large collection of on-line Economics working papers, journal articles and software.

F1000 Research
An Open Research publishing platform for life scientists, offering immediate publication of articles and other research outputs without editorial bias. All articles benefit from transparent peer review and the inclusion of all source data.

Free Full PDF
The aim of FreeFullPDF.com is to increase the visibility and ease of use of open access scientific journals, theses, posters and patents. All scientific subjects are covered and all content are freely available in PDF format.

Free Medical Journals Provides access to free medical journals on a variety of medical topics such as medical biology, cardiology, endocrinology, infectious diseases, genetics, microbiology, neurology, oncology, physiology and many more.

Google scholar
Provides a simple way to broadly search for scholarly literature. You can search across many disciplines and sources: articles, theses, books, abstracts and court opinions, from academic publishers, professional societies, online repositories, universities and other web sites.

 IDEAS
IDEAS is a bibliographic database dedicated to Economics It indexes over 2,800,000 items of research, including over 2,600,000 that can be downloaded in full text.

AGRICOLA Agricultural Produced by the United States National Agricultural Library. Free access provided by NAL.
AGRIS: Agricultural database Covers agriculture, forestry, animal husbandry, aquatic sciences and fisheries, human nutrition, extension literature from over 100 participating countries.

Analytical sciences digital library.
National Science Digital Library and the Analytical Chemistry Division of the American Chemical Society

Arachne Archaeology, Art history

Arnetminer

Computer Science

arXiv

Physics, Mathematics, Computer science, Nonlinear sciences, Quantitative biology and Statistics

ASCE Library

All civil engineering disciplines including structural engineering, geotechnical engineering, transportation engineering, construction engineering,etc

Astrophysics Data System

Astrophysics, Geophysics, Physics

BioOne

Biology, Ecology, and Environmental Science

CiteSeerX

Computer science, Statistics, Mathematics, becoming Multidisciplinary

Civil engineering database

Civil engineering

Citebase Search

Mathematics, Computer science, Physics

 

 

Connecting Repositories

Multidisciplinary

 

DeepDyve

Multidisciplinary

DBLP

computer science conferences and journals

EconBiz

Economics