Entrez - Simultaneously search multiple life sciences databases at the National Center for Biotechnology Information (NCBI).
Gateway - The National Library of Medicine Gateway allows users to search in multiple retrieval systems at the U.S. National Library of Medicine.
Healia - Personalized consumer health search engine. Using specialized algorithms, it attempts to evaluate the quality of health-related content found on web pages.
Healthline - Search engine focused on consumer health care and medical information.
KMLE Medical Dictionary - Search several resources simultaneously for medical terminology, medical abbreviations, journals, and drug names.
Med Help International Search - Consumer medical search engine comprising articles, patient support groups, glossary, and questions and answers.
MedHunt - A tool from Health on the Net that searches the full text of 60,000 medical documents. Searches can be narrowed by location or type of source.
Medical World Search - This tool has the ability to query other search engines, also provides a discussion forum, medical spelling and drug acronym devices. All users must register and pay annual membership fee.
Medic8.com - Directory and medical search engine for healthcare professionals.
Medstory - Find a search for health and medical information.
SearchMedica - Search engine for medical professionals focusing on clinical research, Medline, evidence-based medicine and other professional medical content.
U.S. Non-Commercial Medical Search Engines - Dr. Claudia Krenz provides search boxes and instructions for specialist search tools, mainly maintained by the National Library of Medicine.
Vivísimo ClusterMed - Sends requests to the PubMed search engine and clusters the search results.
Worldhealthcare.net - A UK based medical search engine providing informative resources from around the globe.