DOAJ Director of Open Access Journals - The aim of the Directory of Open Access Journals is to increase the visibility and ease of use of open access scientific and scholarly journals thereby promoting their increased usage and impact. The Directory aims to be comprehensive and cover all open access scientific and scholarly journals that use a quality control system to guarantee the content.

HINARI- The Health InterNetwork Access to Research Initiative (HINARI) provides free or very low cost online access to the major journals in biomedical and related social sciences to local, not-for-profit institutions in developing countries.

HighWire HighWire Press at Stanford University develops and maintains the Web versions of important journals in biomedicine and other disciplines. A list of journals with free full-text science articles online is available.
HighWire Free Online Full Text Journals

Scielo Scientific Electronic Library Online is a model for cooperative electronic publishing of scientific journals on the Internet developed to meet the scientific communication needs of developing countries, particularly Latin America and the Caribbean countries.