Virtual collection

Academic Search Engines
Wolfram Alpha introduces a fundamentally new way to get knowledge and answers - not by searching the web, but by doing dynamic computations based on a vast collection of built-in data, algorithms, and methods.Wolfram Alpha introduces a fundamentally new way to get knowledge and answers - not by searching the web, but by doing dynamic computations based on a vast collection of built-in data, algorithms, and methods.

This is a global science gateway-accelerating scientific discovery and progress through a multilateral partnership to enable federated searching of national and international scientific databases

Arachne is the central Object database of the German Archaeological Institute (DAI) and the Archaeological Institute of the University of Cologne. Arachne is intended to provide archaeologists and Classicists with a free internet research tool for quickly searching hundreds of thousands of records on objects and their attributes

ChemXSeer is an integrated digital library and database allowing for intelligent search of documents in the chemistry domain and data obtained from chemical kinetics.

CEDB is a free bibliographic database offering over 200,000 records of all publications by American Society of Civil Engineers. It is updated at the end of each month. The update includes the journal content for the following month and all other content published in the previous month.

CORE (COnnectingREpositories) aims to facilitate free access to scholarly publications distributed across many systems. As of today, CORE gives you access to millions of scholarly articles aggregated from many Open Access repositories.

The DBLP server provides bibliographic information on major computer science journals and proceedings. Initially the server was focused on DataBase systems and Logic Programming (DBLP), now it is gradually being expanded toward other fields of computer science.

DOAJ is an online directory that indexes and provides access to quality open access, peer-reviewed journals.

DOAB provides open access to over 854 Academic peer-reviewed books from 25 publishers.

PubMed Central is a free digital database of full-text scientific literature in biomedical and life sciences.

Indian Science Abstracts (ISA) is database which covers the abstracts of scientific work done in India since 1965. Original research articles short communications, review articles, and informative articles published in current Scientific and technical periodicals, as well as Indian standards and thesis are reported in ISA. It is a leading abstracting database in India covering entire spectrum of Science and Technology including Intellectual Property Rights, Management and Library & Information Science.

Ingentaconnect lets you search and browse over 9,610 publications.

Microsoft Academic Search is a free academic search engine developed by Microsoft Research. It covers more than 48 million publications and over 20 million authors across a variety of domains with updates added each week.

OALib consists of a Search Engine, based on a database with metadata of Open Access (OA) papers, a Journal with OALib Articles, Index with metadata entries of external OA journal articles, and the Repository with own OALib PrePrints as well as external preprints and postprints, all stored in one of the 322 OALib Disciplinary Repositories

PubMed comprises more than 23 million citations for biomedical literature from MEDLINE, life science journals, and online books. Citations may include links to full-text content from PubMed Central and publisher web sites.

POPLINE provides access to 370,000 carefully selected publications and resources related to family planning and reproductive health

As a digital scientific library, INIST-CNRS has been helping researchers, engineers and information professionals with their work for the past 20 years by providing access to, referencing, distributing and archiving information.Has53 million indexed records of articles, books, conference proceedings in the fields of science, technology, medicine, Humanities and Social Sciences. The articles come from 178,000 different journals. 400,000 monographs are listed.

ROAD: Directory of Open Access scholarly Resources, is a service offered by the ISSN International Centre with the support of the Communication and Information Sector of UNESCO. Launched as a beta version on 16th December 2013, ROAD will be developped during 2014 (extension of the coverage, additional features...).

Social Science Research Network (SSRN) is devoted to the rapid worldwide dissemination of social science research and is composed of a number of specialized research networks in each of the social sciences.

OAIster is a union catalog of millions of records representing open access resources that was built by harvesting from open access collections worldwide using the Open Archives Initiative Protocol for Metadata Harvesting (OAI-PMH). Today, OAIster includes more than 30 million records representing digital resources from more than 1,500 contributors.