Guidelines International Network http://www.g-i-n.net/
Association of organisations and individuals involved in the systematic development and application of clinical practice guidelines. Features a searchable list of members.
Health Technology Assessment (HTA) Programme http://www.ncchta.org/
Established by the UK NHS (National Health Service) to provide medical professionals with high-quality information on the cost, effectiveness, and impact of treatments and tests. Includes evidence-based HTA reports (PDFs).
Medical Services Advisory Committee http://www7.health.gov.au/msac/
Advises the Australian Minister for Health and Aging on evidence for the safety, effectiveness and cost-effectiveness of new medical technologies and procedures, and publishes relevant guidelines in the form of evidence-based assessment reports (PDF).
National Guideline Clearinghouse http://www.guideline.gov/
The Agency for Healthcare Research and Quality in the United States presents a searchable database of clinical practice guidelines, abstracts, and an annotated bibliography.
National Prescribing Centre MeReC http://www.npc.co.uk/merec.htm
Established by the UK National Health Service, MeRec produces MeReC Bulletin, MeReC Extra and MeReC Briefing publications providing evidence-based reviews of medicines and prescribing-related issues.
NICE Guidance http://www.nice.org.uk/page.aspx?o=ourguidance
Evidence-based guidance in the form of (1) technology appraisals, (2) clinical guidelines, and (3) interventional procedures applicable throughout England, Wales and Scotland. From the National Institute of Clinical Excellence, part of the National health Service.