Tools for literature search
The universe of academic information is constantly expanding, and services to make that information accessible are also expanding:
Google Scholar - this has a wealth of related tools for literature research.
worldwidescience.org - this portal is special as it can be used with many different languages.
Major publishers or publishing networks
Bioline International - A "not-for-profit scholarly publishing cooperative committed to providing open access to quality research (bioscience) journals published in developing countries" (Open Access).
BioOne Complete - A "full-text database of more than 200 leading journals in the biological, ecological, and environmental sciences"
ScienceDirect - Search portal for peer-reviewed journals, articles, book chapters and open access content published by Elsevier. Find articles from over 3,800 journals and more than 37,000 book titles.
Taylor & Francis Online - A commercial publisher in all major subject areas. When viewing a journal page, open access content is indicated by an orange unlock icon.