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

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

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

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

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/

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/

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

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/

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/

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

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

Worldhealthcare.net
- A UK based medical search engine providing informative resources from around the globe.
- http://www.worldhealthcare.net/