The TRIP database
http://www.tripdatabase.com/
Turning Research Into Practice. Provides rapid access to a wide range of reliable, clinically relevant and robust sources of evidence about medicines from around the world. Access by subscription, but non-subscribers to the TRIP database are allowed five free searches. Free to low-income countries.
Database of Essential Information on Therapeutics (in Spanish)
http://www.sietes.org (http://www.icf.uab.es)
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, non-profit institutions in developing countries.
http://www.healthinternetwork.org/