Med Help International Search
Consumer medical search engine comprising articles, patient support groups, glossary, and questions and answers.
http://www.medhelp.org/search.htm

Medic8.com
Directory and medical search engine for healthcare professionals.
http://www.medic8.com/

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.
http://www.hon.ch/MedHunt/

Gateway
The National Library of Medicine Gateway allows users to search in multiple retrieval systems at the U.S. National Library of Medicine.
http://gateway.nlm.nih.gov/

Entrez
Simultaneously search multiple life sciences databases at the National Center for Biotechnology Information (NCBI).
http://www.ncbi.nlm.nih.gov/gquery/gquery.fcgi

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.
http://www.mwsearch.com/

Healia
Personalized consumer health search engine. Using specialized algorithms, it attempts to evaluate the quality of health-related content found on web pages.
http://www.healia.com/

Vivísimo ClusterMed
Sends requests to the PubMed search engine and clusters the search results.
http://clustermed.info/

KMLE Medical Dictionary
Search several resources simultaneously for medical terminology, medical abbreviations, journals, and drug names.
http://www.kmle.com/

Healthline
Search engine focused on consumer health care and medical information.
http://www.healthline.com/

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.
http://www.claudiax.net/US_medsearch.html

SearchMedica
Search engine for medical professionals focusing on clinical research, Medline, evidence-based medicine and other professional medical content.
http://www.searchmedica.com

Medstory
Find a search for health and medical information.
http://www.medstory.com/